An Irish surname, Brennan comes from the Gaelic term ‘branain’ which means a little crow or raven. There is also the Gaelic term ‘braon’ which means a tear drop. The spelling variations for Brennan include MacBrennan, Brenan, McBrennan, Brannen, Branon, Branen and Brannyn. In England the Brennan surname is in most of England some of Wales. The greater populations of Brennan families is in Lancashire, Yorkshire, the city of London and Cheshire. In Ireland most with the Brennan surname originated in the County Kilkenny. In Scotland the family name of Brennan is mostly in the southern region. Those with the Brennan name reside in Lanarkshire, Renfrewshire, Ayrshire, Midlothian, Fife, West Lothian and Stirlingshire. Within the United States the Brennan surname originated in New York, Pennsylvania, Illinois, New Jersey and Massachusetts. Famous: Bridin Brennan (singer from Ireland), Colt Brennan (professional football player), James Alexander Brennan (songwriter), Enya Brennan (Irish singer and composer), Joseph Brennan (professional basketball player), Kevin Brennan (comic), Walter Brennan (movie film and television actor), Tom Brennan (professional ice hockey player), Scott Brennan (Olympic rower from Australia) and Owen Edward Brennan (founder of Brennan’s restaurant in the New Orleans).