What is the origin for the tradition that Judas Iscariot is the twin brother of St. Thomas the Apostle?

Judas Iscariot is the twin brother of St. Thomas the Apostle ? I am not saying that St. Thomas the Apostle's is the twin brother of Judas Iscariot. I am simply seeking resource historical information that states this so. Some years ago, a priest friend of mine stated that there was an obscure legend or tradition that St. Thomas the Apostle, who was called the twin, claimed that his twin brother was no one other than the infamous traitor of Our Lord, Judas Iscariot. My priest friend in no longer amongst us and I have never known him to be wrong on such things. I have not been able to locate a source of any such legend or tradition. Can anyone locate a possible source of this obscure legend or tradition?