Didymus is the Greek word for “twin” and was the surname or designation of the apostle Thomas in John’s Gospel. It identifies the same disciple elsewhere called Thomas.
Definition
Didymus is the Greek word meaning “twin.” It is a surname or designation of the apostle Thomas.
Biblical Usage
John uses Didymus to identify Thomas in passages concerning the disciples and the risen Christ. It therefore refers to the same apostle elsewhere called Thomas.
Historical Background
The name is the Greek equivalent of the Aramaic or Hebrew designation Thomas, meaning “twin.”
Historical Bible Dictionaries
Easton's Bible Dictionary
(Gr. twin = Heb. Thomas, q.v.), John 11:16; 20:24; 21:2.
Smith's Bible Dictionary
(the twin), a surname of the apostle Thomas. (John 11:16; 20:24; 21:2) [Thomas]
International Standard Bible Encyclopedia (ISBE)
<p>did'-i-mus (Didumos, i.e. "twin"): The surname of THOMAS (which see).</p>