Last NameBRENNAN

Key Findings

• Popularity: Brennan is the 603rd most popular first name in the U.S., placing it among the top 99.9% all first names.
• Population: An estimated 61 thousand Americans bear the name Brennan. Based strictly on 100 years of Social Security Administration (SSA) baby name records, the living population with this name is roughly .
• Frequency: Approximately 19 out of every 100,000 Americans are named Brennan.
• Usage: It is most often used as a last name (91% of the time).