Andrew - Brother of Peter.

 Andrew is said to have been martyred by crucifixion at the city of Patras (Patræ) in Achaea, in AD 60. Early texts, such as the Acts of Andrew known to Gregory of Tours, describe Andrew as bound, not nailed, to a Latin cross of the kind on which Jesus is said to have been crucified; yet a tradition developed that Andrew had been crucified on a cross of the form called crux decussata (X-shaped cross, or "saltire"), now commonly known as a "Saint Andrew's Cross" — supposedly at his own request, as he deemed himself unworthy to be crucified on the same type of cross as Jesus had been. The iconography of the martyrdom of Andrew — showing him bound to an X-shaped cross — does not appear to have been standardized until the later Middle Ages. Wiki.