rah-zhon
rä-zhŏn
That's the way Rajon Rondo pronounces it, and that's that. He oughta know. I disagree that ALL his teammates mispronounce his name; some of them get it right. So do most of the Celtics broadcasters, and some of the local radio/tv talking heads. A lot of people who should know better mispronounce it. But the only correct way is to listen to him say his own name.
There's a clip that used to be played fairly often on the big screen at the Garden, where he starts with the simple sentence, "I'm Rajon Rondo." Is anyone going to argue that they know better than Rajon Rondo about how to pronounce his own name? End of debate.
He's a great player and a champion. He deserves the respect of saying his name correctly. Any local sports talking head, and especially any Celtics broadcaster, who mispronounces his name, should be ashamed. I won't mention any names, but the initials "Donny Marshall" come to mind.