Oh, I'm so glad to hear that the little guy is doing better. Sounds to me you've got one strong, brave little kitten! Thank you for saving him.

Here are some names I'd like to suggest:

For His Personality:
-Bryan or Brain = Strong one
-Casey = Brave

For His Appearence:
-Ash
-Smokey
-Smudge

Hope this helps and I adore the pics of him. He's so precious!