Childish name that was the title of a Broadway play -- but best known as a type of apple. The Dutch variation is Pepijn is finding some popularity in that country, where short nickname names are stylish. Keep this one as a term of affection.
Peregrin "Pippin" Took, hobbit character in "The Lord of the Rings"
King of the Pippins, apple variety aka PrincessPippin "Pippin," Broadway musical (very) loosely based on the life of Pepin, the son of Charlemagne
Pippin, main character in British children's comic "Pippin" and TV series "Pogles' Wood"
Pippins, Girl Guides for ages 5-6