Descendant of Braonán; teardrop or sorrow
Derived from the Irish surname Ó Braonáin, which stems from the word 'braon' meaning a drop or moisture. While often interpreted as 'teardrop,' it can also signify rain or a small drop of water. It transitioned from a traditional Irish surname to a popular given name in the late 20th century.
Less common today
Brennan isn't in the latest US Top 1000. It last peaked at #243 in 2009.
US births per 5-year period, 1990–present (SSA data).
Christian author and speaker
Main character played by Will Ferrell · Step Brothers
Major League Baseball outfielder
American stage and screen actor
