Aw, it's just a tiny baby. I'm a big fan of people names for my animals. I like Jane, Bill...you know...those really tough names to pronounce and remember??
I shall weigh the critter when its next walkabouts no idea on age. I would assume under a year by looking at other pictures? I gather it would be to early to tell which sex it is?.
I have used cartoon character names to match personalities. I have a Butters from South Park and Pig Pen from Peanuts. My most recent is a rescue and she has several scars on her shell so i named her SCARlett from Gone With the Wind. Good luck. Torts don't learn their names so you can always change it.