How did Bugs Bunny get his name?

One time in 1940, Warner Bros. demanded from its illustrators to sketch a "tall, lanky, mean rabbit" for a cartoon titled "Hare-um Scare-um". Someone in the office mistakenly labeled one of the submission from a cartoonist as "Bugs Bunny" instead of Bugs Hardaway.

The sketches made by Hardaway, however, were not used but the words that labeled them were given to the rabbit star of the 1940 cartoon "A Wild Hare". From then on, "Bugs Bunny" was introduced and became popular.