Brennah \b-rennah, br(en)-nah\ as a girl's name is a variant of Brenna (Gaelic), and the meaning of Brennah is "little drop of water; raven or black-haired".

The baby name Brennah sounds like Breanna, Breonna, Breona, Breina, Breana, Breena, Brenn, Brynna, Brinna, Brenne, Brienna and Briannah. Other similar baby names are Brenndah, Brendah and Brennan.