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There still is "illegitimacy" in this family but it no longer has the stigma it once had. I imagine if you trace pretty much any family tree at some point the husband will not be the father of the off spring.(Archbishop of Canterbury, Paula Yates and so on - it happens)
My husband has got no idea who some of the fathers are on his side but his children and his brothers children seem stop have an oriental appearance some people have asked my child if she had oriental blood in her. He is not looking to find the very person he is related to just "someone" from China (or wherever)
So, purely out of interest, he would like to know what blood is running through his veins.