According to Eastern Christian tradition, Addai of Edessa (Syriac: ܡܪܝ ܐܕܝ, Mar Addai or Mor Aday sometimes Latinized Addeus) or Thaddeus of Edessa was one of the seventy disciples of Jesus. He is possibly identical with Thaddaeus, one of the Twelve Apostles. From an early date his hagiography is filled with legends and fabrications. The saint himself may be entirely fictitious.