"No-va" might confuse him a little.
In sled dogs, you have to name your dogs carefully because of the commands. ("hike, gee, haw, break-and-hook") Because calling for "LEE, to HAW" will confuse the hell out of him. Or telling "NA-NOOK," which might sound like "break-and-hook", to "GEE or HAW" might make the dogs stop instead of turn.
I wouldn't name him "NO-VA", because he might think he did something bad if you stress the first part of his name a little too much. It's hard to say. It would probably be like saying "NO, va!" to him.