Sorry, but I can't think of anything I like about that name - oh, and I've just remembered that a dear friend's loathsome, bullying father was called Ronald. Maybe that association is what makes me dislike it so much, but the Ronald McDonald association is indeed unfortunate and might well cause your DS grief.
Yes, surprisingly Ronnie is a rather nice nickname. Gerry is too though, and if you like names that end "ald" how about Gerald? I think it's much nicer than Ronald; it's a strong name but somehow less hard sounding.