husband's grandmother

I'm looking for info on my husband's grandmother and her family. We know very little and would like to learn more about her side of the family. Her name is Tennie Hancock born May 22,1906 at Tahlequah,Oklahoma territory to William H. and Mary Elizabeth (Hollis) Hancock and died July 28,2000.Her name at that time was Tennie (Hancock) Slape at Bartlesville, Washington County, Oklahoma. We also know she had a twin brother named Toy and a sister named Velma. Her obit said she was preceded in death by 10 siblings including Toy. Velma was the only surviving sibling at that time. Thanks for all the help.

NancyLawyer