You have this conversation at lunch:

9-year old: Guess what, Mr. Noon? My grandpa’s dad was in World War II.

Teacher: Well, my dad was in WWII also.

9-year old: Hey! What was his name?

Teacher: His name was Noon.

9-year old: Oh! I think my grandpa might know him!

(grandpa’s dad??)

…and it isn’t very funny.