He seems perfectly at home here! It's the other two cats who aren't too happy about the situation. They hiss if he gets too close. But I think they'll warm up to him eventually.
He DOES have huge paws. And huge ears!
He reminds me of one of those foxes with the big ears:
What a handsome little man! You just have a house full of feline cuteness! Thanks for sharing the pics. I look forward to watching him grow into those huge paws.
I like the name Sebastian. A very dignified name for what I am sure will one day be a very regal looking kitty. I had to come and look at all that cuteness again.
Milo is another name I've thought of.
But you may be right - Jack and Milo would make cute kitten names, but Sebastian may be more fitting long term when he's a grown up cat with a big fuzzy ruff looking like a little lion!