Help finding great grandmother

We have know my great grandmother to be from the Cherokee tribe. We knew she was born in 1896 in either New York or Philadelphia. Her name was Aleka Runningwater. We recently obtained a birth certificate for my grandmother, Aleka’s daughter. It listed my grandmother’s mother as Maria Moffa. No family member has ever heard of this name. We can not find it listed on any site either. We were wondering if she would of been given an English name, but she never used it? Thank you!