My daughter is not my husband's biological child. Her surname is different from ours, but my ex-husband gave up all parental rights before we moved to Doha last year. (He was a terrible father and actually requested to give up his rights so he wouldn't have to pay child support) I don't know if my ex giving up his rights was the reason we had no problems, but we all made it here together and no one ever mentioned the differences in names.