What's funny is that my nephew Dawson's first name is actually Travis, after his father who's first name is actually Larry after HIS father. That's why I gave my son his own first name and he took his father's as his middle name.
All my younger nephews (Noah, Jeremy, Nathan and Jason) go by their first names. My oldest nephew is the only one who goes by his middle name. My brothers both go by their middle names, though. My brothers are Matthew Trey and Timothy Shane. My dad also goes by his middle name (Charles Michael).