kimabrown82 on Family Tree Circles

yes, my name is kim. my mother is full blooded indian, her father was lavern black bull. i was told we are related to sitting bull. i want to find who is related to him for sure to try and link our family. i just know my mothers fathers last name was blackbull. i do know my mother's mom has a great in their with the name wambdi tanka. i dont know what that means, but i do know some where we are related to sitting bull but where do i start to look??? im stuck!!!