Cassius Marcellus Coolidge (September 18, 1844 – January 13, 1934) was an American artist, mainly known for his series of portraits Dogs Playing Poker. Known as "Cash" or "Kash" in his family, he often signed his work in the 19th century with the latter spelling, sometimes spelling his name, for comic effect, as Kash Koolidge. Source: Wikipedia (en)