I actually didn't notice the venison thing until you pointed it out- I was just thinking about the fact that I don't like
Dennis. I'd probably use Denison as a mn, but if it was a fn I'd do something like Denison
Oliver, Denison
Paul, Denison
Luther, Denison
James, Denison
George, etc. Any fairly usual mn that doesn't end with "on", "en", or "an".