He is probably for a male...
It depends of his breed, his personality and his behavior : Here is a little list with H ( letter of the year...2012 )
Hammer or Hamer
Hazer, Heat, Hello, Helio, Helios,Helium, Helmer, Hendrix,Hercule, Herode, Heros, Hertz, Hidalgo, Hilmar, Hippo, Hirsute, Hit, Hobbit, Hobbo, Hocus, Holby, Hold up, Homere, Hominus, Hooligan, Hooper, Hoover, Hop? Hot, Houmous, Houston, Hubbie, Hudson, Huge, Hulk, Humphrey, Hunter, Hurricane, Husky, Hutch, Hyde, Hydromel, Hypso...
If you don't want to use the letter of the year, I have a list for each letter !!!