G-Delta - A weird way to mix a 'Ga' last name with a Greek letter, pro

A weird way to mix a 'Ga' last name with a Greek letter, probably just to sound smart or make people confused.

My G-Delta is 'Ga-Omega' and I use it to annoy my little brother.

My sister's G-Delta is 'Ga-Lambda' and she wears it on her shirt like it's a brand.

I got a 'Ga-Psi' G-Delta and now I have to explain it to everyone.