Names

I just thought this was interesting. Ian is fine with calling two people Grandma and Grandpa (actually Papa) and 4 people Great Grandma. But yesterday we were at a swim/birthday party for Rex's aunt and cousin's son. He has a cousin named Kristy. We were in the pool and I told Ian that her name was Kristy. He just looked at her like, "she is not Kristi, what are you talking about?" (I guess my sister is the only Kristi there is.) Also when we saw Rex's grandpa Collier, he would not call him Great Grandpa (or anything). Grandpa Collier is the only great grandpa that is left.