A cursory Google says that this is an unfounded rumor that has popped up every so often since he was cast. I can't find anyone verified or an actual news outlet that has picked this up. Seems like OP needs to find some better receipts and until then stop posting rumors.
oh my God. back then I sincerely felt bad for doubting the actor's heritage, and now there's this. but then again, how reliable is this Twitter source? are any other outlets corroborating this information?