Mickey Mouse was conceived in secret while Disney produced the final Oswald cartoons he contractually owed Mintz. Disney asked Ub Iwerks to start drawing up new character ideas. Iwerks tried sketches of various animals, such as dogs and cats, but none of these appealed to Disney. A female cow and male horse were also rejected. (They would later turn up as Clarabelle Cow and Horace Horsecollar.) A male frog was also rejected, which later showed up in Iwerks' own "Flip the Frog" series. Walt Disney got the inspiration for Mickey Mouse from a tame mouse at his desk at Laugh-O-Gram Studio in Kansas City, Missouri. In 1925, Hugh Harman drew some sketches of mice around a photograph of Walt Disney. These inspired Ub Iwerks to create a new mouse character for Disney. "Mortimer Mouse" had been Disney's original name for the character before his wife, Lillian, convinced him to change it, and ultimately Mickey Mouse came to be. The actor Mickey Rooney claimed that, during his Mickey McGuire days, he met cartoonist Walt Disney at the Warner Brothers studio, and that Disney was inspired to name Mickey Mouse after him. This claim, however, has been debunked by Disney historian Jim Korkis, since at the time of Mickey Mouse's development, Disney Studios had been located on Hyperion Avenue for several years, and Walt Disney never kept an office or other working space at Warner Brothers, having no professional relationship with Warner Brothers. Over the years, the name "Mortimer Mouse" was eventually given to several different characters in the Mickey Mouse universe : Minnie Mouse's uncle, who appears in several comics stories, one of Mickey's antagonists who competes for Minnie's affections in various cartoons and comics, and one of Mickey's nephews, named Morty.