The family name Reagan, and its cognates Regan, O'Regan, O Regan, O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin. The meaning is likely to originate in ancient gaelic from ri "sovereign, king" and the diminutive -in, "the king's child", transliterating as "little king".
The feminine unisex forename, Regan, is likely to have derived sometime later from the English royal name Regina.
Notable people with the surname include:
Ronald Reagan (1911–2004), 40th President of the United States
Nancy Reagan (1921–2016), wife of Ronald Reagan and First Lady from 1981 to 1989
Maureen Reagan (1941–2001), President Reagan's daughter from his first marriage to Jane Wyman
Michael Reagan (born 1945), President Reagan's adopted son and radio talk show host
Patricia Ann Reagan (born 1952), better known as Patti Davis, Ronald and Nancy Reagan's daughter
Ron Reagan (born 1958), President Reagan's son and journalist
Frank Reagan (1919–1972), American football player
John Henninger Reagan (1818–1905), American politician
Johnny Reagan (born 1926), American college baseball coach
Lisa Reagan, American singer
Marc Reagan, NASA Station Training Lead and NEEMO underwater program Mission Director
Michael Joseph Reagan (born 1954), American judge
Ron Reagan (Florida representative) (born 1954), American politician
