It is possibly a Celtic, Irish, Breton or Occitan name.
Several sources associate the name with the Celtic word “bre”, meaning “hill”, in which case, by extension, the name’s meaning is “high” or “honorable”.
It is a popular name in Ireland, due to the fame of the Irish king Brian Boru.
It was a popular name in the United States in the late 60’s and 70’s. In England ans Wales it was very popular in mid 30’s.
Feminine forms of the name are Briana, Breana, Bryanna, Bryanne.
Other forms of the name are Bryan, Bryon, Briant, Brion, Brien.
Famous bearers are Brian de Palma, Brian Wilson, Brian Eno, Brian May, Brian Epstein, Brian Johnson, Brian Jones, Brian Molko, Brian Austin Green, Brian Boitano, Brian Moorman, Brian O’Driscoll, Brian Cox, Brian Blessed, Brian Dennehy, Brian Friel, Brian Moore.
Brian Molko is a British American singer, songwriter.
He is the lead vocalist and guitarist of the rock band Placebo.
Brian Epstein was an English entrepreneur and music manager.
As soon as he heard the band “The Beatles” he became their manager and secured deals with record labels.