Carl's full name is Carl Ellis Love Sponge.

Let's start with Carl. That's after the 'Good Dog, Carl' books by Alexandra Day!

'Love Sponge', well, he sure is one. Just sponges up love!

'Ellis', that's the complicated part. Okay, The first letters of Love Sponge are "L" and "S" If you say those letters together you get "Ellis". So, that's my boy Carl Ellis Love Sponge!