Surname · Irish origin
Brennan
Meaning
The surname Brennan means Descendant of Braonán.
Origin
Irish
Type
patronymic
The origin of the surname Brennan
Brennan comes from Ó Braonáin, linked to “sorrow” or “moisture.”
What kind of surname is Brennan?
Brennan is a patronymic surname, derived from a father's or ancestor's given name. It belongs to the Irish naming tradition — you can read how Irish surnames were formed on our Irish last names page.
Other Irish surnames
Other patronymic surnames
Family names formed the same way, from different cultures.
Frequently asked questions
What does the surname Brennan mean?
The surname Brennan means Descendant of Braonán. Brennan comes from Ó Braonáin, linked to “sorrow” or “moisture.”
Where does the surname Brennan come from?
Brennan is a surname of Irish origin.
What kind of surname is Brennan?
Brennan is a patronymic surname, derived from a father's or ancestor's given name.
What are other Irish surnames?
Other Irish surnames include Boyle, Byrne, Callaghan, Connolly, Daly, Doyle.