I guess I didn't think of that! Well here's some options that I hope will give you more choices! If you still can't come up with anything let me know! :)
Options:
1) use a name that sounds like
Amber:
Ambrus,
Ambrose,
Amadeus, Am_____
2) use a name that is a color or means a color like gold or yellow or amber
3) use a form of his father's name
