What's in a name?

Although his "official" name may be Jackson Keane Hardt, we have already established plenty of nicknames for him. Here's just a sample:

-Jack (for obvious reasons)
-Peanut (GrandPop was right when he said some names stick)
-One eyed milk bandit (for the way he keeps only one eye open when he is rooting for milk)
-El Tigre ("the tiger" in spanish - sums up the way he eats!)
-Kitty cat (for the noises he makes)
-Jack Attack (for the way he attacks mommy when he's hungry)
-Jack of Hardts (Thanks to Grandma Honey for coming up with this one)