The Family of Mary, also known by its full name, Pro Deo et fratribus—Family of Mary (PDF-FM), is an Association of the Faithful of Pontifical Right for clergy and laity in the Catholic Church. The clerical arm of the association is called Work of Jesus the High Priest (Latin: Opus Jesu Summi Sacerdotis), the members of which bear the post-nominal title Opus J.S.S. The affiliated branch of consecrated women is called the Apostolic Sisters of the Family of Mary, with the post-nominal initials F.M.[1]