My guess is the 't' in 'otl' stands for Thomas. Or Timothy. Or Terrance. Maybe Tony but then Tony is mostly short for Anthony so probably not. What about Triangle? I give up.
Edit: this is a test to ask does anything happen when a comment or post is edited?
I am not seeing what you are seeing, but it could be short for 'axolotl'. If you didn't understand they were destined for world dominance, that's on you.
Edit: I think the post gets edited when you edit it. Dunno.