McClanahan
An Irish surname meaning “son of Clanahan,” from a Gaelic personal name or nickname now obscure.
The #3,429 most common surname in the United States (2010 Census) — about 1 in every 29,667 Americans shares it.
Etymology
McClanahan is an Anglicized Irish surname built on Mac, meaning “son of,” plus a personal name or byname of uncertain original form. The second element is usually treated as a form of Clannachán or a related Gaelic name, ultimately connected with clann, “children” or “family,” though the exact source is not fully secure. In practice, the name means “descendant of Clanahan” rather than referring directly to a modern English word.
History
The surname is found in Irish and Irish-American family lines, especially in forms that have shifted in spelling as Gaelic names were rendered into English. Variants with Mc-, Mac-, and without the prefix appear in records, reflecting local pronunciation and clerical spelling. In the United States, the name is most associated with families of Irish origin.
Origin
Regions
Variant spellings
Fun fact
Clanahan and McClanahan are related spellings in the same wider name family, showing how one Irish surname could produce several English forms.