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.