You could always shorten the singular to ‘Lemmi’ or something similar to prevent confusion.

Good point though!

I get the impression that the goal is more to have Lemmy fill the hole that Reddit has left rather than duplicating it in some way; Take the good and leave the bad.

I don’t think this is for self identification as much as a way for third parties to refer to a user group.

I second this one. Even though it’s fairly close to Lemmings, it does roll of the tongue and is unique enough from any other title.