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It also depends on the last name. Short last names will be used more than long ones, male or female. Funny last names more than non-funny ones.

Did you vote for Donald or Hillary?

Bernie or Warren ?

It goes back to coaches using last names in sports practices. This probably is changing as there is more gender balance in youth sports.

In the case of male Youtube makers, I find lack of any name whatsoever is more likely the case.