A brief anecdote from Grandma Nack:
When I was with the boys, I spelled their names, including their last name. Then I told them I had another name than Grandma, which was Pat. Finn looked at Henry and said, "Her last name is Grandma." 🙂
In possibly related news, alongside "Sweaty," "Nonsense," and the other firemen, Finn now deploys Fireman Jim Nack. Go figure.