I love the name!! Now you'll have to get him a palymate and name it Curly or Larry!!
Your other cat will adjust - just give it time. Is your other cat male or female? When I got Tigger (my male cat) he was just a baby and Gracie (my female adult cat) took right to him - and I believe Tigger thinks Gracie is his momma.
Please post pictures when you can so we can see how he's growing!