My step-son wants me to adopt him so he can legally have my last name. His parents currently have joint custody but his father has told both he and his brother that he wants nothing to do with them (we have a text to this effect). Without adoption, are we able to request this change? His brother will be 18 next month and has already stated he will change his name. My youngest step-son is only 14. Will Oklahoma allow him to take my name without revoking father's rights? Father is also 1 yr behind on chld support and we are wondering if we could get him to allow the change and agree to adoption if the child support was waived. My wife has been diagnosed with Lupus and she is afraid of revisiting custody as she has disabilities that may be used against her. note: the divorce was in Arizona.