This Gaelic gender-neutral name began as a surname in Ireland, but has been used as a first name in the US since the 1960s. Its soft, gentle tone may sound more modern to some than Brendan, a much more common name of the same ethnic genre. Brennan's Irish sensibility will please parents (Irish and otherwise) who want to give their boy or girl a solid Gaelic name. As far as popularity goes, it just made it into the Top 1,000, proving it's an awesome name that's not overexposed.
Popularity Trend Chart
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Source: Social Security Administration
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