Molly Marmalade is the name of a pink jellyfish companion. When Ms. Taffy thought about Molly’s last name, something jelly-related would’ve been punny. Being partial to old fashion orange marmalade as a child, Molly’s last name came to Ms.Taffy quite easily.
Since Molly’s arrival, there has been multiple jellyfishies staying with Ms. Taffy.
Fun fact: Molly coincidentally shares the same stage name as a British burlesque dancer. Kinda awesome.