Of Irish origin.
From the surname Ó Braonáin, which means “descendant of Braonán”.
Braonán is an Irish given name, which means “sorrow”.
Sources also mention the Irish “braon” meaning “moisture”, “drop”.
Other forms of the name are: Brenan, Brennon.
Famous bearers are Brennan Elliott, Brennan Williams, Brennan Bailey, Brennan Mejia, Brennan Manning.