Brennan is a variant of Brendan. Brendan is an old Celtic name that is common in England and Ireland. It is derived from the Latin Brendanus or the Old Irish Breanainn which means “he who lives by the beacon”.
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Brennan is a variant of Brendan. Brendan is an old Celtic name that is common in England and Ireland. It is derived from the Latin Brendanus or the Old Irish Breanainn which means “he who lives by the beacon”.