Raegan is a spelling of Reagan, an Irish surname, Ó Riagáin, usually explained as "little king" or "impulsive one". It became a girls' name in America in the 1990s, helped by the familiarity of President Ronald Reagan's surname, and the ae-spelling followed Raelyn and Rae. Raegan peaked at number 219 in 2019 and has fallen since, from number 282 in 2021 to number 506 in 2025.