The name Brennan is a girl's name of Irish origin meaning "descendent of the sad one".

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Brennan is an Irish last name that could join the group of similar names now ranking among the top Irish names for baby girls in the US: Riley, Kennedy, and Quinn. Currently, only 16 baby girls were named Brennan versus over 200 boys, but those numbers could well become more equal. 

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Brennan

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The name Brennan is a boy's name of Irish origin meaning "descendent of the sad one".

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Brennan is a winning Irish surname name, more modern than Brian or Brendan, more unusual than Conor and Aidan.  The only possible problem with Brennan: people might think you're saying Brendan.
<br/><br/>Brennan eased onto the very bottom of the popularity list in 1966, and has pretty much remained in the Top 1000 ever since.


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