Brennan is a ♂ boy name.
The given name Brennan derived from the Irish surname “Ó Braonáin”, but is also a contracted form of Brendan.
Brennan means “descendant of Braonán” and Braonán means “drop”, “rain” and “moisture”, but as well “teardrop” and “sorrow” (from Irish “braon”). Thus, Brennan could mean “descendant of the sad one”. Deriving from Brendan, Brennan means “prince” and “chieftain”.
Based on the frequency of positive ratings, we can analyze how popular names are in different countries. The name Brennan is currently ranked #8215 on the name leaderboard.
Curious about more trends? Find out which names are most popular in the USA, Canada, Australia, and worldwide.

Find more beautiful names!
Download our free baby name app now and swipe a beautiful name together with your partner!
