I was wondering what is Grandpa Simpson First Name

I was wondering what is Grandpa Simpson First Name

His first name is Abraham.

His first name is Abraham.
Right, and they often call him "Abe" for short

The reason why I asked is because in one episode in season 2 Granpa called Homer JR.

Ha I never realized that. How is he homer Jr if grandpas name is abe?

I heard Abe say JR

Has Homer's full name ever been said?

not that I know of

According to The Simpsons: A Complete Guide to Our Favorite Family
(1997), Homer's full name is "Homer J. Simpson." It doesn't specify, though,
what the initial "J" stands for.

I seem to recall reading somewhere that Matt Groening picked "J" because he
was a fan of Jay Ward's Rocky & Bullwinkle cartoons; and the heroes
names were Rocket J. Squirrel and Bullwinkle J. Moose.

Scoobie, i expect he called him junior because Homer is younger, not because his name is also Abe (Cause its not)