Alexander of Jerusalem was a third-century Christian bishop and presbyter who served in both Cappadocia and Aelia Capitolina. Born in Cappadocia, he was a student of Clement of Alexandria and a contemporary of Origen. He is recognized as the first verifiable bishop of Cappadocia before moving to Jerusalem to assist the elderly Bishop Narcissus. Alexander is remembered for his intellectual contributions, including the establishment of a library in Jerusalem and his support for the teachings of Origen.