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Gender: F Meaning of Brennan: "descendent of the sad one" Origin of Brennan: Irish

Poised for popularity, Brennan is an Irish last name soft enough to borrow from the boys.

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Famous People Named Brennan

Kiernan Brennan "Kiki" Shipka, child actress (plays Sally Draper on 'Mad Men' & Cathy in the TV movie 'Flowers in the Attic')

Pop Culture References for the name Brennan

Temperance Brennan-main character on TV show "Bones"