Thomas Called Didymus: Who Was the Twin?
John gives Thomas a second name, Didymus, which means twin, but the verse never says who the twin was. What the text does show is Thomas urging his fellow disciples to go and die with Jesus.
Thomas Called Didymus in John 11:14–16
Thomas is called Didymus in John 11:16, and the passage leaves his twin unnamed. What the verses do show is a disciple resolving to follow Jesus toward death.