John Van Ryn was an American tennis champion of the 1930s. He was primarily known as the doubles partner of Wilmer Allison.

Wilmer Lawson Allison Jr. was an American amateur tennis champion of the 1930s. Allison was both a fine singles player and, along with his frequent partner, John Van Ryn, a great doubles player. He won the 1935 U.S. Championship in singles and was ranked US No. 1 in 1934 and 1935.