There's a story behind 'George Francisco'. It seems when the film was in production the script had been written with the character named 'George Jetson', and most of the film had been shot when they received word that Hanna-Barbera Productions would not release the character name for them to use. They scrambled to come up with another name and came up with Sam Francisco, and had his human partner complain about it, insisting he instead call him George. This way they didn't have to reshoot any critical scenes where the character was already addressed as George. Then the series had everyone call him George.