People interned during World War I

Otto Froitzheim (German pronunciation: [ɔto fʀøːtshaɪ̯m]; 24 April 1884 – 27 October 1962) was a German tennis player. He won the singles and doubles titles at the World Hard Court Championships in 1912. He also won an Olympic Silver medal in singles in 1908 and was a finalist at Wimbledon in 1914.

Joseph Hubertus Pilates (9 December 1883 – 9 October 1967) was a German-born physical trainer, writer, and inventor. He is credited with inventing and promoting the Pilates method of physical fitness. He patented a total of 26 apparatuses in his lifetime.