Didymus

Easton's Bible Dictionary (1897)

(Gr. twin = Heb. Thomas, q.v.), John 11:16; 20:24; 21:2.

Smith's Bible Dictionary (1863)

(the twin), a surname of the apostle Thomas. (John 11:16; 20:24; 21:2) [Thomas]

Hitchcock's Bible Names Dictionary (1869)

a twin; double

Public domain dictionaries.