 Many of these congregations belong to the International Association of Messianic Congregations and Synagogues (IAMCS), the Union of Messianic Congregations (UMJC), or Tikkun International.The Messianic Jewish Alliance of America (MJAA) began in 1915 as the Hebrew Christian Alliance of America (HCAA).As the idea of maintaining Jewish identity spread in the late 1960s, the Hebrew Christian Alliance of America (HCAA) changed its name to the Messianic Jewish Alliance of America (MJAA).