Is it normal that my girlfriend looks like a younger version of my mother?

It's likely strictly coincidental. If subconsciously you happen to be attracted to her because she resembles your mother... even then don't worry about it! As long as you and you're gf are happy and treat each other right, who cares who she looks like?

At least she doesn't look like your father

Remind me of the #0 Rock episode where Liz dates a younger guy, then mets his mom, that is her doppelganger.

But i mean, who doesnt want to date Tina Fey?

This reminds me of the Family Guy episode when Chris goes out with a girl that is completely identical to Lois.

U must feel like a motherfucker!

yes normal. It would not be normal if she looked like your mother and had the same name as her. That would be weird.

Actually I see this a lot. Same with women and boyfriends who resemble their father. I think it just might be that you have a good relationship with your mother and find that attractive in other women. Which sounds super creepy but is quite normal