Ardellar and Ocie may seem like unusual names to you, but there are 18 Ardellars on the SSDI, but only one is named Bradshaw.There are 4 Ocie Bradshaws, do you have any dates, or approximate dates on this man?
Combined info from CA Dth Idx Online and SSDI:
Ardellar Bradshaw, b 7 Sep 1879 AL, d 27 Jul 1968 Contra Costa Co, CA;88 yrs old; last residence Pittsburg, Contra Costa Co, CA; mother's maiden name Atkins; SS card issued in OK.
If this is a match, look for an obituary, survivors are often listed, and you might pick up names of any married daughters, too.
Is Dee Bradshaw a man or woman?Is Dee a child of Ocie's, or Ardellar's?Is Ocie one of Ardellar's children?Who is your grandma Powell?Where did she live when you visited?You don't say anything about where in TX any, or some of these people resided.