Baron John Both de Bajna (Croatian: Ivan Bot od Bajne, Hungarian: bajnai Both János ; ? – 1493) was a Hungarian nobleman from the Both family, who served as, alongside Emeric Derencsényi, Ban of Croatia, Slavonia and Dalmatia in 1493. His brother, Andrew Both also acted as ban from 1504 to 1507. Lord of Sykava in 1492, John was killed in the siege of Brinje in 1493.