Meaning, origin, history
Brennan is an Irish surname that has also become a given name in recent years. The name originates from the Irish Gaelic word "Ó Braonáin," which means "descendant of Branán." Branán himself was likely a personal name derived from the Old Irish word "braon" meaning "sad" or "mournful."
The Brennan surname is believed to have been brought to Ireland by the Normans in the 12th century, and it has since become one of the most common surnames in Ireland. Despite its origin as a surname, Brennan has also gained popularity as a given name, particularly in English-speaking countries.
Throughout history, several notable figures have carried the Brennan name. One of the most famous is Thomas Francis Meagher (1823-1867), an Irish-American political leader who fought for Irish independence and later served as the governor of Montana. He was known by his middle name, Francis, but his full name was Thomas Francis Brennan Meagher.
In literature, the Brennan family plays a significant role in William Trevor's novel "The Story of Lucy Gault." The story follows the Brennans, a wealthy Irish family living in County Cork, and their daughter Lucy, as they navigate the complexities of love, loss, and betrayal.
Overall, Brennan is an Irish surname turned given name with a rich history and meaningful origins. While it may have started out meaning "descendant of Branán," its true significance lies in the countless individuals throughout history who have carried this proud name.
In numbers
Popularity of the name Brennan since 1880
Total births
32,821
Total since 1880
Peak year
2009
1,464 births
in 2023
212
Recent births (5 years)
5-year trend
-49%
↘
vs previous 5 years