If you've heard this name, it's probably from the hero of the acclaimed Julia Glass novel, Three Junes, or else the political scientist Richard Fenno. As well as a Finnish name, it's alos a Frisian diminutive from names in the Frederick family, making it is a cousin of Freddie, Fritz and Fedde. This name is so rare it's never appeared on the charts, but with its energetic O ending it might appeal if you're looking for an alternative to names like Otto and Arlo.