William Tredwell "Treddy" Ketcham, Jr. (August 6, 1919 – July 18, 2006) was a United States Marine Corps officer in World War II and a sports director in tennis and squash afterwards.

After the war he graduated from Yale Law School, and worked for the American Secretary of State in London, as a special assistant to the chairman of NATO.

As such he was president of the United States Squash Racquets Association, and for many years director of the International Lawn Tennis Club (USIC).

mortar and artillery fire on four pillboxes and, after destroying these, moved his company on to commanding ground, reorganized and successfully repulsed a counterattack of some twenty Japanese.

His skill, initiative and courageous devotion to duty in the face of enemy fire were in keeping with the highest traditions of the United States Naval Service.http://www.jamestownpress.com/news/2006-03-23/Obituaries/025.html