Seánánach
Seánánach is an Irish-language name that may function as both a given name and a surname. In Irish onomastics it is formed from Seánán, a diminutive or affectionate form linked to Seán (John), with the suffix -ach used to form adjectives and demonyms. The result is a term that can denote belonging to or descending from a person named Seánán.
Etymology and usage: The precise origin is uncertain, but Seánánach is generally treated as a derivative of
Examples and notes: There are no widely recognized public figures primarily known as Seánánach, and bearers