Brennan \b-rennan, br(en)-nan\ as a boy's name (also used as girl's name Brennan), is pronounced BREN-an. It is of Irish and Gaelic origin, and the meaning of Brennan is "teardrop". Variant of Brendan.
Brennan has 6 variant forms: Brenan, Brenn, Brennen, Brennin, Brennon and Brenyn.
For more information, see also the related name Brandon.
Baby names that sound like Brennan are Brannon and Brannen.