Type Word Usage Old Celtic (Hypothetical) Meaning & History Celtic word meaning "hill, high" [1]. Related ItemsFamily Tree·Details Other Languages & Culturesbrií(Old Irish) 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 78.