Moynihan is a surname of Irish origin. Recorded in several spellings forms including Moynihan, Monahan, Monaghan, Monaham, Minihane, Minihan, and probably others, this is an Irish surname of great antiquity. It originates from the Irish language Ó Muimhneacháin, which literally translates as "male descendant of the Munsterman". The surname is most popular in Counties Cork and Kerry, which form part of the province of Munster. The modern spellings are usually Moynihan and Monaghan, the spelling in the 16th century being generally recorded as Minighane, and regarded as the principal surname of West Cork. Michael and Mortimer Moynihan were famous rebels in the late 16th century, and hailed from Skibbereen. Several of the name were famine immigrants into New York City, who embarked from Liverp