In honor of what American president was the Teddy Bear invented?

The Teddy Bear was invented in honor of President Theodore Roosevelt. It all began when Theodore Roosevelt was on a bear hunting trip near Onward, Mississippi on November 14, 1902. Mississippi's Governor Andrew H. Longino had invited him, but unlike other hunters in the group, Theodore had not located a single bear. Roosevelt's assistants cornered and tied a black bear to a willow tree. They summoned Roosevelt and suggested that he shoot it. Viewing this as extremely unsportsmanlike, Roosevelt refused to shoot the bear.

Source: National Park Service