The Green Bay Packers were founded on August 11, 1919 by Curly Lambeau and Ted Olson. Lambeau solicited funds for uniforms from his employer, the Indian Packing Company. He was given $250 for uniforms and equipment, on the condition that the team be named for its sponsor. Today, "Green Bay Packers" is the oldest team name still in use in the NFL.
Looking through the packers billhead I have shown below, note that most have graphics and the graphics fall into two categories – factories or pigs.