Decendent of Sitting Bull Lakota Sioux

Hello,i was told by my mother that i was a relative of Sitting Bull, My Grandfather was the Son of White Cloud,i have alot of info on my grandfather but am having the names put in order,i have the names Rebecca,clara and White Cloud,any other info will be posted when i get it all figured out,any info would be helpful in my search for my family,and i will share anymore info i find on here,thank you .