Their mom is Italian and their dad is English/Scottish. They’re obviously fraternal twins and Nyle must have strongly inherited his mother’s genes while Nico got their father’s. It’s certainly interesting to see the phenotypes so polarized. The utter lack of resemblance between them wouldn‘t lead you to guess they were even related, let alone twins (albeit non-identical ones.) Ironically for Nyle, who looks like he was plucked right out of Southern Europe, DiMarco wasn’t their last name at birth. It is their mother’s maiden name and they started using it at some point after they got away from their father. Otherwise he would still be Nyle Thompson…doesn‘t have the same ring to it. Nyle DiMarco works much better for him professionally.