•
Kai Aareleid (born 1972), Estonian writer •
Kai Alaerts (born 1989), Belgian skier •
Kai Alexander (born 1997), British actor •
Kai Altair (born 1984), American musician •
Kai Althoff (born 1966), German multimedia artist •
Kai Ambos (born 1965), German judge •
Kai Normann Andersen (1900–1967), Danish composer •
Kai Arzheimer (born 1969), German professor •
Kai Asakura (born 1993), Japanese mixed martial artist •
Kai Atō (1946–2015), Japanese actor •
Kai Behrend, German mathematician •
Kai Belton, American politician from Connecticut •
Kai Bird (born 1951), American journalist •
Kai Bjorn (born 1968), Canadian sailor •
Kai Böcking (born 1964), German television presenter •
Kai Bracht (born 1978), German ski jumper •
Kai Brodersen (born 1958), German historian •
Kai Luke Brümmer (born 1993), South African actor •
Kai Brünker (born 1994), German footballer •
Kai Aage Bruun (1899–1971), Danish writer •
Kai Budde (1979–2026), German gamer •
Kai Bülow (born 1986), German footballer •
Kai Bumann (1961–2022), German conductor •
Kai Burger (born 1992), German footballer •
Kai Cenat (born 2001), American YouTuber •
Chang Kai (born 1964), Chinese physicist •
Chen Kai (born 1993), Chinese footballer •
Kai Chang (born 2000), Jamaican discus thrower •
Kai Cipot (born 2001), Slovenian footballer •
Kai Compagner (born 1969), Dutch rower •
Kai Corbett (born 2002), Spanish footballer •
Kai Correa (born 1988), American baseball coach •
Cui Kai (born 1982), Chinese track and field athlete •
Cui Kai (footballer) (born 1987), Chinese footballer •
Kai Curry-Lindahl (1917–1990), Swedish zoologist •
Deng Kai (born 1959), Chinese politician •
Kai Diekmann (born 1964), German journalist •
Kai Donner (1888–1935), Finnish linguist •
Kai Ebel (born 1964), German sports journalist •
Kai Eckhardt (born 1961), German musician •
Kai Edwards (born 1998), Australian swimmer •
Kai Edwards (basketball) (born 1997), Dutch basketball player •
Kai Eide (born 1949), Norwegian diplomat •
Kai Ekanger (1929–2018), Norwegian politician •
Kai Ellis (born 1980), American football player •
Kai Engelke (1946–2025), German poet, writer, and music journalist •
Kai Arne Engelstad (born 1954), Norwegian speed skater •
Kai Ephron (born 1965), American film director •
Kai T. Erikson (1931–2025), Austrian-born American sociologist •
Kai Ewans (1906–1988), Dutch-American musician •
Kai Fagaschinski (born 1974), German musician •
Kai Falkenberg, American lawyer •
Kai Falkenthal (born 1965), German yacht racer •
Kai G. Farley (born 1973), Liberian politician •
Feng Kai (born 1974), Chinese speed skater •
Kai Fischer (born 1934), German actress •
Kai Fjell (1907–1989), Norwegian painter •
Kai Abdul Foday (1924–2013), Sierra Leonean politician •
Kai Forbath (born 1987), American football player •
Kai Fotheringham (born 2003), Scottish footballer •
Kai Frobel, German ecologist •
Kai Gehring (born 1977), German politician •
Kai Gehring (footballer) (born 1988), German footballer •
Gong Kai (1222–1307), Chinese politician •
Kai Greene (born 1975), American bodybuilder •
Kai Greene (soccer) (born 1993), American soccer player •
Kai Grjotheim (1919–2003), Norwegian chemist •
Kai Gronauer (born 1986), German baseball player •
Kai Gullmar (1905–1982), Swedish composer •
Kai Haaskivi (born 1955), Finnish footballer •
Kai Häfner (born 1989), German handball player •
Kai Hahto (born 1973), Finnish drummer •
Kai Hansen (born 1963), German musician •
Kai Harada (born 1999), Japanese rock climber •
Kai Havertz (born 1999), German footballer •
Kai Heerings (born 1990), Dutch footballer •
Kai Helenius (born 1931), Finnish diplomat •
Kai G. Henriksen (1956–2016), Norwegian businessman •
Kai Herdling (born 1984), German footballer •
Kai Erik Herlovsen (born 1959), Norwegian footballer •
Kai Hermann (born 1938), German journalist •
Kai Hesse (born 1985), German footballer •
Kai Hibbard (born 1978), American activist •
Kai Hietarinta (born 1932), Finnish businessman and ice hockey executive •
Kai Hirano (born 1987), Japanese footballer •
Kai Hirschmann, English civil servant •
Kai Ho (1859–1914), Hong Kong barrister •
Kai Holm (1896–1985), Danish actor •
Kai Holst (1913–1945), Norwegian activist •
Kai Honasan, Filipino singer-songwriter •
Kai Hormann (born 1974), German computer scientist •
Kai Horstmann (born 1981), English rugby union footballer •
Kai Horwitz (born 1998), Chilean skier •
Kai Hospelt (born 1985), German ice hockey player •
Hou Kai (born 1962), Chinese politician •
Hu Kai (born 1982), Chinese sprinter •
Kai Huckenbeck (born 1993), German speedway racer •
Kai Huisman (born 1995), Dutch footballer •
Kai Hundertmarck (born 1969), German cyclist •
Kai Ishii (born 1993), Japanese rugby union footballer •
Kai Ishizu (born 2002), Japanese footballer •
Kai Ishizawa (born 1996), Japanese boxer •
Kai Jahnsson (born 1965), Finnish sport shooter •
Kai Jensen (1897–1997), Danish athlete •
Kai Johan Jiang (born 1965), Swedish-Chinese businessman •
Kai Johansen (1940–2007), Danish footballer •
Kai Johansson (born 1969), Finnish swimmer •
Kai Jones (born 2001), Bahamian basketball player •
Kai Kahele (born 1974), American politician •
Kai Kalima (1945–2023), Finnish politician •
Kai Kamaka III (born 1995), American mixed martial artist •
Kai Kantola (born 1987), Finnish-American ice hockey player •
Kai Kara-France (born 1993), New Zealand mixed martial artist •
Kai Karsten (born 1968), German sprinter •
Kai Kasiguran (born 1985), American soccer player •
Kai Kazmirek (born 1991), German decathlete •
Kai Kennedy (born 2002), Scottish footballer •
Kai Killerud, Norwegian handball player •
Kai Klefisch (born 1999), German footballer •
Kai Knagenhjelm (1898–1987), Norwegian civil servant •
Kai Knudsen (1903–1977), Norwegian judge •
Kai Ko (born 1991), Taiwanese actor and singer •
Kai Kobayashi (born 1993), Japanese racewalker •
Kai A. Konrad (born 1961), German economist •
Kai Koreniuk (born 1998), Dutch-American soccer player •
Kai Kovaljeff (born 1985), Finnish ski jumper •
Kai Aage Krarup (1915–2013), Danish equestrian •
Kai Krause (born 1957), German software designer •
Kai Kroeger (born 2002), American football player •
Kai Krüger (born 1940), Norwegian jurist •
Kai Kyllönen (born 1965), Finnish athlete •
Kai Lagesen (born 1965), Norwegian footballer •
Kai Langerfeld (born 1987), Canadian rower •
Kai Larsen (1926–2012), Danish botanist •
Kai Laukkanen (born 1975), Finnish motorcycle racer •
Kai Lawonn (born 1985), German computer scientist •
Kai Lee, Chinese-American scientist •
Kai Leete (1910–1995), Estonian ballet and folk dancer •
Kai Lehtinen (born 1958), Finnish actor •
Kai Lenny (born 1992), American surfer •
Li Kai (born 1989), Chinese footballer •
Kai Li (born 1954), Chinese-American computer scientist •
Kai Li (businessman) (born 1962), Chinese-American businessman •
Liang Kai (1140–1210), Chinese painter •
Kai Lightner (born 1999), American climber •
Kai Lindberg (1899–1985), Danish politician •
Ling Kai (born 1986), Singaporean singer-songwriter •
Kai Linnilä (1942–2017), Finnish editor •
Liu Kai (disambiguation), multiple people •
Kai Locksley (born 1996), American football player •
Kai Londo (1845–1896), Sierra Leonean warrior •
Kai Lossgott (born 1980), German-South African artist •
Lu Kai (198–269/270), Chinese military general •
Lü Kai (died 225), Chinese politician •
Lu Kai (badminton) (born 1991), Chinese badminton player •
Kai Luibrand (born 1994), German footballer •
Kai Lykke (1625–1699), Danish noble •
Ma Kai (born 1946), Chinese politician •
Kai Mahler (born 1995), Swiss skier •
Kai Matsuzaki (born 1997), Japanese footballer •
Kai McKenzie-Lyle (born 1997), English footballer •
Kai Meriluoto (born 2003), Finnish footballer •
Kai Merk (born 1998), German footballer •
Kai Metov (born 1964), Russian singer-songwriter •
Kai Michalke (born 1976), German footballer •
Kai Miki (born 1993), Japanese footballer •
Kai Møller (1859–1940), Norwegian politician •
Kai Montinola (born 2006), Filipino model and actress •
Kai Müller (born 1988), German canoeist •
Kai Mykkänen (born 1979), Finnish politician •
Kai Nacua (born 1995), American football player •
Kai Nielsen (disambiguation), multiple people •
Kai Niemi (born 1955), Finnish motorcycle racer •
Kai Nieminen (born 1950), Finnish writer •
Kai Nurminen (born 1969), Finnish ice hockey player •
Kai Nürnberger (born 1966), German basketball player •
Kai Nyyssönen (born 1972), Finnish footballer •
Kai O'Donnell (born 1999), Australian rugby league footballer •
Kai Ortio (born 1965), Finnish ice hockey player •
Kai Oswald (born 1977), German footballer •
Kai Outa (1930–2002), Finnish weightlifter •
Kai Øverland (1931–1975), Norwegian politician •
Kai Owen (born 1975), Welsh actor •
Kai Owen (rugby union) (born 1999), English rugby union footballer •
Kai Owens (born 2004), American skier •
Kai Ozaki (born 1987), Japanese skier •
Kai Paananen (born 1954), Finnish businessman •
Kai Pahlman (1935–2013), Finnish footballer •
Kai Pearce-Paul (born 2001), English rugby league footballer •
Kai Peterson (born 1962), German actor •
Kai Pfeiffer (born 1975), German visual artist •
Kai Pflaume (born 1967), German television presenter •
Kai Pirttijärvi, Finnish athlete •
Poh Soo Kai (born 1930), Singaporean doctor •
Kai Pröger (born 1992), German footballer •
Kai Puolamäki, Finnish physician •
Qidiao Kai, Chinese philosopher •
Qin Kai (disambiguation), multiple people •
Kai Rapsch (born 1978), German musician •
Kai Rautio (born 1964), Finnish ice hockey player •
Kai Remlov (born 1946), Norwegian actor •
Kai Reus (born 1985), Dutch cyclist •
Kai Rimmel (born 1952), Estonian politician •
Kai Risholt (born 1979), Norwegian footballer •
Kai Røberg (born 1973), Norwegian footballer •
Kai Rooney (born 2009), English footballer •
Kai Rossen, German chemist •
Kai Rüder (born 1971), German equestrian •
Kai Rüütel (born 1981), Estonian singer •
Kai Ryssdal (born 1963), American radio journalist •
Kai Sakakibara (born 1996), Australian cyclist •
Kai Salomaa, Finnish-Canadian computer scientist •
Kai Sasaki (born 1998), Japanese footballer •
Kai Sato (born 1984), American entrepreneur •
Kai Sauer (born 1967), German-Finnish diplomat •
Kai Schäfer (born 1993), German badminton player •
Kai Schoppitsch (born 1980), Austrian footballer •
Kai Schramayer (born 1968), German wheelchair tennis player •
Kai Schumacher (born 1979), German pianist •
Kai Schwertfeger (born 1988), German footballer •
Kai Scott (born 1970), American attorney •
Kai Selvon (born 1992), Trinidadian sprinter •
Kai Setälä (1913–2005), Finnish professor •
Kai Shibato (born 1995), Japanese footballer •
Kai Siegbahn (1918–2007), Swedish physicist •
Kai Simons (born 1938), Finnish professor •
Kai Sjøberg (1936–1994), Norwegian footballer •
Kai Smith (born 2004), Emirati cricketer •
Kai Somerto (1925–1969), Finnish diplomat •
Song Kai (disambiguation), multiple people •
Kai Soremekun, Canadian filmmaker •
Kai Sotto (born 2002), Filipino basketball player •
Kai Staats (born 1970), American filmmaker •
Kai Starr (born 1964), American author •
Kai Steffen (born 1961), German footballer •
Kai Ove Stokkeland (born 1978), Norwegian football manager •
Kai Stratznig (born 2002), Austrian footballer •
Kai Strauss (born 1970), German singer •
Kai Suikkanen (born 1959), Finnish ice hockey player •
Sun Kai (born 1991), Chinese footballer •
Kai Swoboda (born 1971), Australian canoeist •
Kai Syväsalmi, Finnish ice hockey player •
Tan Kai (born 1973), Chinese computer technician •
Tang Kai (born 1996), Chinese mixed martial artist •
Kai Cheng Thom, Canadian writer •
Tian Kai (died 199), Chinese general •
Kai Tier, Australian comedian •
Kai Toews (born 1998), Japanese basketball player •
Kai Tracid (born 1972), German disc jockey •
Kai Trewin (born 2001), Australian footballer •
Kai Trump (born 2007), American social media personality •
Kai Twilfer (born 1976), German merchant •
Kai Ueda (born 1996), Japanese baseball player •
Kai van Hese (born 1989), Dutch footballer •
Kai Verbij (born 1994), Dutch speed skater •
Kai von Warburg (born 1968), German rower •
Kai Wagner (born 1997), German footballer •
Wang Kai (disambiguation), multiple people •
Kai Walter (born 1973), German canoeist •
Kai Warner (1926–1982), German musician •
Kai Wartiainen (born 1953), Finnish architect •
Kai Wegner (born 1972), German politician •
Kai Wehmeier (born 1968), German-American philosopher •
Kai Wessel (disambiguation), multiple people •
Kai Whittaker (born 1985), German politician •
Kai Widdrington (born 1995), British dancer •
Kai Wiesinger (born 1966), German actor •
Kai Ashante Wilson, American author •
Kai Winding (1922–1983), Danish-American musician •
Kai Wright, American journalist •
Kai Wucherpfennig, German-American biologist •
Kai Wulff (born 1949), American actor •
Xing Kai (born 1989), Chinese footballer •
Xu Kai (born 1995), Chinese actor •
Kai Yearn (born 2005), English footballer •
Yee Seu Kai, Malaysian politician •
Kai Zeiglar (born 1981), American football player •
Kai Zen (actress) (born 2012), American actress •
Zhang Kai (born 1982), Chinese basketball player •
Zhang Kai (lawyer), Chinese lawyer •
Zheng Kai (born 1986), Chinese actor •
Zong Kai, Chinese Paralympic athlete •
Zou Kai (born 1988), Chinese gymnast
Cai •
Cai Cortez (born 1988), Filipino actress •
Cai Emmons (1951–2023), American author •
Cai Evans (born 1999), Welsh professional rugby union player •
Cai Griffiths (born 1984), Welsh rugby union player •
Cai Gundelach (1891–1954), Danish equestrian •
Cai Hegermann-Lindencrone (1807–1893), Danish general and politician •
Cai-Göran Alexander Stubb (born 1968), Finnish politician ==Fictional characters==