I got this from Baby name world
http://www.babynamesworld.com/
Name/origin/meaning
Xander / Greek / Defending men
Xanthias / Greek / Yellow
Xanthippos / Greek / Yellow horse
Xanthos / Greek /Yellow
Xanthus / Greek / Yellow
Xavier / Basque / New house
Xenophanes / Greek N/A
Xenophon / Greek / Foreign voice
Xerxes Boy Persian Chief
Ximena Boy Hebrew Listening
z就有很多listing, cannot post all here... 不如你自己用佢個search engine 玩
http://www.babynamesworld.com/
search by gender (M/F), and you can choose "start with" : z