I like it for you. It's always a name I thought would be cool in theory, and the namesake is really, really cool. Plus, it sounds great with the other names. :-)
Ptolly is cute, but I think I prefer Lem. Not
Lemmy though.
Combos? Hmm. Besides Ptolomy
Ray, of course... hmm... Ptolomy
Christian, Ptolomy Bendict (that was the varient of
Benedict you use, right?, maybe Ptolomy Kolbe.