Kinger has 11 children
So, based on this image
it looks like Kinger has three children and a dog, which is basically another child.
Caine is also Kingers child, in a way. And bubble is like apart of Caine, siblings kinda.
And then there are the people he acts somewhat paternal to: Ragatha, Pomni, Gangle(?).
And Jax and Zooble(depending if you ship Funnybunny, Abstragedy, or somethng else) they are his children-in-law.
Kingers children: Pawnling 1 (irl) Pawnling 2 (irl) Pawnling 3 (irl) Dog (pet) Ragatha (by action) Pomni (by action) Gangle (by action) Jax (in-law) Zooble (in-law) Caine (creation) Bubble (creation)
Idk about Abel(it's hinted at but not really canonicalized) I kind of think they're Bubble, but it's also not confirmed so they could be separate, so maybe Kinger has 12 kids.