westsidetennisclub

Ichiya Kumagae (of Japan) played in the national championships, according to NYT of Aug 22, 1916 query.nytimes.com/gst/abstract.html?res=9907E3D81E3FE233A... en.wikipedia.org/wiki/Ichiya_Kumagae

He was eliminated in the second round that year.
See

thanks for the additional information on Kumagae. We will add the information to the record at the next update.

William Rosenbaum

Defeated in the first round of the 1917 U.S. Championships: query.nytimes.com/mem/archive-free/pdf?res=9B00E6DC103AE4... From the Jews in Sports site: "Rosenbaum, William The first known Jewish player to achieve an American ranking, William didn't play tennis full-time due to his prolific dental practice. Dr. Rosenbaum later became the chairman of the New York Oral Surgery Society, but remained close to the game by officiating at times. Birth and Death Dates: b 1888 - d. Sept. 16, 1951 Career Highlights: Rosenbaum was 63rd as the first American ranked Jew and had a career best ranking in class three of No. 31-No. 40 in 1914-1915. Even though he graduated from the New York University College of Dentistry, William managed to win the National indoor doubles championship twice and was runner-up in the National indoor singles championship in 1914. Later in his career, Rosenbaum won five National outdoor senior doubles crowns. "

Thanks RN and AS, we can add full name to the records.

Presumably en.wikipedia.org/wiki/John_Strachan_%28tennis%29 "Strachan reached the semifinals of the U.S. National Championships in 1917."

swanq: Thanks for providing this information. We'll add it to the record when we next update.