Hi Xerus, thought I'd help you since you helped me out with JHAS.
First off, the members of Little Jerry and the Monotones were named after the Muppeteer who performed them.
Little Jerry by Jerry Nelson, Big Jeffy by Jeffrey Moss, Chrissy by Christopher Cerf, and Rockin' Richard by Richard Hunt.
Secondly, gotta clear up the confusion over Chrissy from the Monotones and Chris who's the leader of the band "Chris and the Alphabeats".
Chrissy is the lavender AM from the Monotones, often referred to as Little Chrissy by others I would guess in a bit of a mental slip after introducing "Big" Jeffy.
Chris is a blue AM who has wild yellow hair, beady black eyes, and wears yellow round-rim glasses, yellow shirt, blue jeans, and brown polished shoes. He's the leader of Chris and the Alphabeats, who sang "Count It Higher". He often gets called Chrissy by others like in the Patty LaBelle alphabet song. However, his name is Chris and shouldn't be confused with Chrissy, nor as "Little Chrissy".
Hope this helps and have a good night.