You know this reminds me of a convo long ago, which actually has a bit of a funny. Like your Greg.
So my show birds used to be named for pop stars. Not all of them just the dozen to 20 odd that would stay on.
As chicks they were just given a number related to parentage. (Say 52/63). Anyhow the best were named, (Cher, Lemi, Bon Scott etc) and I was showing my Uncle.
He runs a farm breeding stud merinos, and decided to copy the idea.
He had Johnny Diesel, Roy Orbison, etc.
Anyhow, a few years back he split his flock and one of his new lambs was up for naming. My little cousin suggested Lady Gaga, for a ram.
Now as it turned out, Lady Gaga is one of the most successful rams hes ever bred, and it still to this day causes much confusion in those circles of rural men, if not also a bunch of mirth and laughing.
So to me, Greg & Simba are fine.
I think I might carry on the old tradition of pop star names when I get my grow on, I have trouble with assigning names at the best of times.