Where Does the Sheahan Surname Come From?

Seen on a birth certificate or a ship's manifest, Sheahan is usually a form of Sheehan. Surname dictionaries give the meaning as “Descendant of Síodhachán ("peaceful")”.

How the spelling arose

Only a small detail separates the spellings: Sheahan has “a” where Sheehan has “e”. Other spellings include O'Sheehan and Sheehane.

Heraldry and the Sheahan name

Heraldry is personal: arms associated with the Sheehan surname were borne by specific families, and sharing the name does not mean sharing the blazon.

Get the complete Sheahan report, with a museum-style coat of arms.