•
Cosmo and Damian, third century Christian martyrs • Cosmo de Medici, alternate name of
Cosimo de' Medici (1389–1464) • Cosmo I, alternate name of
Cosimo I de' Medici, Grand Duke of Tuscany (1519–1574) •
Cosmo Alexander (1724–1772), Scottish portrait painter •
Cosmo Alexandre (born 1982), Brazilian professional kickboxer and mixed martial artist • Cosmo Allegretti, actor and puppeteer in the 1955–1984 children's television series
Captain Kangaroo •
Cosmo Baker (born 1974), American disc jockey •
Cosmo Kyrle Bellew (1883–1948), British-American actor •
Cosmo Bonsor, 1st Baronet (1848–1929), British MP, chairman of the South Eastern Railway •
Cosmo Campoli (1923–1997), American sculptor •
Cosmo A. Cilano (1893–1937), New York state senator •
Cosmo Crawley (1904–1989), English cricketer, rackets and real tennis player •
Cosmo D'Angeli (1889–1968), Italian painter and sculptor •
Sir Cosmo Duff-Gordon, 5th Baronet (1862–1931), British landowner, survivor of the
RMS Titanic •
Cosmo Gordon, 3rd Duke of Gordon (1720–1752), Scottish nobleman •
Cosmo Gordon Lang (1864–1945), Archbishop of Canterbury •
Cosmo Graham, British professor •
Cosmo Hamilton (1870–1942), British playwright •
Cosmo Iacavazzi (born 1943), American football player •
Cosmo Innes (1798–1874), British antiquarian •
Cosmo Jarvis (born 1989), American-born English actor and musician •
Cosmo Klein (born 1978), German singer •
Cosmo Kyrle Bellew (1883–1948), British/American vaudeville and film actor •
Cosmo Landesman (born 1954), American-born British journalist •
Cosmo Maciocia (born 1942), Canadian politician •
Cosmo Manuche, English playwright •
Cosmo Pieterse (born 1930), South African playwright, actor, poet, literary critic and anthologist •
Cosmo Pyke, English singer-songwriter, multi-instrumentalist and artist •
Cosmo Parkinson (1884–1967), British civil servant •
Cosmo Francesco Ruppi (1932–2011), Roman Catholic archbishop •
Cosmo Sheldrake (born 1989), English musician, composer, and producer •
Cosmo Whyte (born 1982), Jamaican-born American visual artist •
Cosmo Wilson (born 1961), American concert lighting designer and director for rock bands ==Surname==