When ds1 was was little Elmo used to be Elmomo, no idea where the other 'mo' came from but this was particularly funny when we took him to Sesame Street Beach at Seaworld! ELMOMO, ELMOMO!!!!!

He's now 5 and still calls the Nocturnal house at the zoo the Nocturtle house. So cute!
My DD calls the Count off Sesame Street the Counter - we correct her but she still calls him the Counter