Thomas, also known as Didymus was originally referred to as The Twin. Although his twin is never named. Perhaps the reason for this is not because he was a twin, but was actually just fat. Fat of biblical proportions.
When Jesus had risen from the grave and presented himself to his followers, Thomas is said to have doubted that it was actually Jesus himself. Perhaps Thomas was not actually expressing doubts and was merely looking to reduce the numbers of the group. Thus allowing for larger portions when they distributed their food . It was a a smart move on the part of Thomas. If Jesus was rejected, he gains a larger dinner. Whilst if Jesus is accepted, he loses the Twin tag. Unfortunately for him, he was then saddled with the name Doubting Thomas. Better than being known as the Fat Bloke though.