Type Word Usage Old Irish Meaning & History Old Irish word meaning "hill" [1]. Related ItemsFamily Tree·Details Other Languages & Culturesbrixs(Old Celtic) Given Name DescendantsBreana, Breann, Breanna, Breanne, Brian, Briana, Brianna, Brianne, Brion, Bryan, Bryana, Bryanna, Bryant, Bryon, Bryanne(English) Brian(Irish) Brian(Old Irish) Brajan(Polish) Braian, Brayan(Portuguese (Brazilian)) Brayan(Spanish) Braian(Spanish (Latin American)) Surname DescendantsBryan, Bryant(English) Ó Briain, O'Brian, O'Brien(Irish) Sources & References Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 77.