Brennan

I have forgotten where, but I found it once defined as "Sorrow" in relation to "Teardrop".

Brennan can also be derived from the Irish given name Branán, meaning "little raven," or from German "Brennen," meaning "to burn."

Another surname in misuse by the Americans. It was once an Irish first name, which became a second name, which was translated to English. Now it is widely recognised as a second name. It is hardly ever used as a first name in it's country of origin.