Namesakes
Islamic Caliphs:
2 caliphs
Caliph Osman II (a.k.a. Othman) 1618-1622 Ottoman 
Caliph Osman III (a.k.a. Othman) 1754-1757 Ottoman
Olympic Medalists:
1 bronze
(bronze) Desai Williams (a.k.a. Othman) 1984 4x100 m relay
Ottoman Sultans:
2 sultans, 1 bey
Bey Osman I (a.k.a. Othman) 1281-1326
Sultan Osman II (a.k.a. Othman) 1618-1622
Sultan Osman III (a.k.a. Othman) 1754-1757