Which Saint, known as the "Apostle of the Apostles," was credited for two epistles in the Bible? 
Saint Peter: Saint Peter (Syriac/Aramaic: ܫܸܡܥܘܿܢ ܟܹ݁ܐܦ݂ܵܐ, "Shemayon Keppa", Hebrew: שמעון בר יונה‎ ‎ "Shim'on bar Yona" , Greek: Πέτρος  "Petros" , ; r. AD 30; d. between AD 64 and 68), also known as Simon Peter, Simeon, or Simōn ( ), according to the New Testament, was one of the Twelve Apostles of Jesus Christ, leaders of the early Christian Great Church.
i don't know