Most 30-30s you're gonna find will be Marlins, but Winchesters are fairly common as well. I've never seen a 30-30 by any other manufacturer, but I'm far from an expert, so take that for what its worth.
I liked my marlin pretty well, but I can't say whether its suitable for an eleven year old. I don't remember it kicking too bad, but I was grown when I bought it so who knows. I know a Marlin will take a scope well because I had one on mine. A Winchester ejects out the top though, so you'd need an off-center scope mount, which may require a gunsmith. I'm not sure.