Save Type Surname (from given name) Usage Irish Meaning & History From the Irish Ó Gormáin meaning "descendant of Gormán". The given name Gormán means "little blue one". DetailsRelated Names VariantsÓ Gormáin, O'GormanSame SpellingGorman (1) Categories blue, colors Entry updated January 22, 2019 ·