Boys

Xavier originated is use as a given name after Saint Francis Xavier, cofounder of the Jesuit order, who got his name from the Spanish-Basque village where he was born. His birthplace was Javier, the name of which was derived from the Basque place name Etxeberria, meaning "castle" or "new house."

Zesty brother of Cade and Slade.

Newer than Zac, cooler than Ed, Ned, or Ted.

If you're looking for a name that's light and breezy, this could be it. A name from mythology: Zephyrus/Zephyr was the Greek god of the west wind-- with many European variations, it's a name that's frequently seen in computer and video games, is a character in the children's book Silverwing, and appears in the Babar books--as a monkey.