This is the way a 3 yr old thinks.

Caleb was talking with my mom the other day and said, "Grandma, your name is Brooke".  My mom laughed and said, "No that is your moms name. Do you think that because your mom's name is Brooke, that it is my name too, because I am your Grandma"?

Then Caleb says, "Well Grandpa's name is Jim". 

It was then that my mother understood where he got that conclusion.  

My father's name is Jim, and I married a Jim.

So. . . if both Caleb's grandpa and his dad's names are Jim, of course it comes to reason, that both his grandma and mom's name would be Brooke. 

Hee, hee, isn't that cute!