There are a number of Clintons in the Oklahoma/Arkansas region. It's a big enough name to get a feel for the family look.
You can also see William Jefferson's namesake in historical paintings of the Clinton family. And without a doubt, Chelsea is a Clinton not a Hubbell. I've seen many Clinton family daughters to know she is a Clinton. They all have the same face, same wavy hair, same eyes, and same body.
George Clinton
Henry Clinton (note the pronounced nose and how Henry looks like Webb Hubbell)
DeWitt Clinton (1769-1828), politician, naturalist, philanthropist, and educationist, was one of the most influential figures in New York history
Kinda wish people will get off this topic.