Didymus [E] [H](the twin ), a surname of the apostle Thomas. ( John 11:16 ; 20:24 ; 21:2 ) [THOMAS] [E] indicates this entry was also found in Easton's Bible Dictionary[H] indicates this entry was also found in Hitchcock's Bible NamesBibliography InformationSmith, William, Dr. "Entry for 'Didymus'". "Smith's Bible Dictionary". . 1901.