 Brutus was called Bluto in the original comic strip and cartoons.  When new cartoons were made by King Features in 1960 and 1961 the  producers thought Bluto had been created for the Fleischer cartoons  which would mean they didnt have the rights to the character, so  they renamed him Brutus. Actually, Bluto had appeared in a single  adventure in the comic strip before any Popeye cartoons had been  made. Later Popeye cartoons went back to the name Bluto.