•
Rebecca Ma, American businesswoman, socialite, and social media personality •
Rebecca McConnell (born 1991), Australian mountain biker •
Rebecca Jean MacDonald (born 1974), Canadian curler from Stratford, Prince Edward Island •
Rebecca MacDonald (born 1953), Canadian businesswoman •
Rebecca Macfie, New Zealand author and journalist •
Rebecca MacKinnon (born 1969), author, researcher, Internet freedom advocate, and co-founder of the citizen media network Global Voices •
Rebecca Macree (born 1971), professional squash player from England •
Rebecca Maddern (born 1977), Australian television presenter and journalist •
Rebecca Mader (born 1977), English actress •
Rebecca Madyson (born 1979), Maltese sport shooter •
Rebecca Mahoney (born 1983), rugby union footballer and referee •
Rebecca Makkai (born 1978), American novelist and short-story writer •
Rebecca Malope (born 1968), multi-award-winning South African gospel singer •
Rebecca Marino (born 1990), Canadian professional tennis player •
Rebecca Mark-Jusbasche (born 1954), head of Enron International •
Rebecca Marshall, noted English actress of the Restoration era •
Rebecca Martin (born 1969), American singer and songwriter from Rumford, Maine •
Rebecca Masisak (born 1957), CEO of TechSoup, a nonprofit organization that provides technical assistance to other nonprofits •
Rebecca Massey (born 1969), Australian film, television and theatre actress •
Rebecca Masterton, British Islamic scholar, educator, public speaker, academic, author, television presenter, and philosopher of the Shia Islam •
Rebecca Matlock (1928–2019), American photographer •
Rebecca May (born 2002), English footballer who plays as a midfielder for FA WSL club Manchester United •
Rebecca Mbithi, lawyer, accountant and corporate executive in Kenya, the largest economy in the East African Community •
Rebecca McClanahan (born 1951), Democratic Representative of the second district of the Missouri House of Representatives •
Rebecca McFarland, American actress •
Rebecca McGowan, British taekwondo practitioner •
Rebecca McKenna (born 2001), Northern Irish footballer •
Rebecca Mead (born 1966), English writer and journalist •
Rebecca Meder (born 2002), South African swimmer •
Rebecca Mehra (born 1994), American middle-distance runner •
Rebecca B. Mellors (1899–1989), educator •
Rebecca M. Meluch (born 1956) •
Rebecca Jackson Mendoza (born 1973), Australian actress, singer, and dancer •
Rebecca Mercuri, computer scientist specializing in computer security and computer forensics •
Rebecca Metz, American actress •
Rebecca Meyers (born 1994), Paralympic swimmer of the United States •
Rebecca Miano (born 1966), Kenyan lawyer and corporate executive •
Rebecca Mike, territorial level politician from Pangnirtung, Nunavut •
Rebeka Mikulášiková, Slovak basketball player •
Rebecca Miller (conductor) (born 1975), American conductor •
Rebecca Miller (disambiguation), multiple people •
Rebecca Miller (footballer) (born 1995), Australian rules footballer •
Rebecca Miller (singer), Canadian country music artist •
Rebecca Miller (born 1962), American filmmaker and novelist •
Rebecca Millett (born 1962), American politician from Maine • Rebacca Minkoff, co-founder of the company,
Rebecca Minkoff in 2005 •
Rebecca Mir (born 1991), German model and a TV presenter •
Rebecca Mitchell (disambiguation), multiple people •
Rebecca Moesta (born 1956), author of several science fiction books •
Rebecca Momin (born 1947), Bangladesh Awami League politician and Member of Parliament •
Rebecca Moore (disambiguation), multiple people •
Rebecca Jo Morales (born 1962), American artist born in Torrance, California •
Rebecca More (born 1980), English pornographic actress and model •
Rebecca Morelle, a British science journalist, currently global science correspondent for BBC News •
Rebecca Morris (author),
New York Times bestselling true-crime author and a TV, radio and print journalist •
Rebecca Morris (born 1969), abstract painter •
Rebecca Morse (disambiguation), multiple people •
Rebecca Morton (1954–2020), American political scientist. She was Professor of Political Science at New York University New York and New York University Abu Dhabi •
Rebecca Moses (born 1958), American fashion designer, illustrator, author based in New York City •
Rebecca Brewton Motte (1737–1815), plantation owner in South Carolina and townhouse owner in its chief city of Charleston •
Rebecca Moynihan (born 1981), Irish Labour Party politician who has been a Senator for the Administrative Panel since April 2020. •
Rebecca Mpagi (born 1956), Ugandan military officer and Aircraft Maintenance Engineer, who serves as the Director of Personnel and Administration in the UPDF Air Force. She is credited as the first female in Uganda to qualify as a military aircraft maintenance engineer •
Rebecca Muambo (born 1985), Cameroonian freestyle wrestler. She competed in the women's freestyle 48 kg event at the 2014 Commonwealth Games where she won a bronze medal •
Rebecca Mulira (died 2001), Ugandan women's rights advocate and social activist •
Rebecca Murray (born 1990), American Paralympic four-time gold medalist and wheelchair basketball player from Richfield, Wisconsin •
Rebecca Musser (born 1976), American author and activist. She was a wife of the late Fundamentalist Church of Jesus Christ of Latter Day Saints prophet Rulon Jeffs and escaped before bringing legal proceedings against the church ==N==