Martha Wayne (Earth-50)

Martha Kane, called Martha Wayne after marrying Thomas Wayne, was the mother of Bruce Wayne, was the crimefighter called Batman.

Bio
Martha Kane was the daughter of Vernon Kane, a senator, and the granddaughter of Irish immigrants. She married Thomas Wayne, whom she met while going to Harvard. They had a son named Bruce.

Martha and Thomas both met their tragic fate at the hands of a mugger, as an eight year old Bruce watched helplessly. This caused Bruce to train to become the crimefighter Batman, to avenge his parents death.