"The Bible and the Church recognizes seven archangels, although just three are known by name, Michael, Gabriel, and Raphael."
https://www.catholic.org/saints/angels/archangels.php "As of Council of Rome in 745 under the reign of Pope Saint Zachary, the Catholic Church officially only acknowledges the names of three of the seven Archangels: St. Michael, St. Gabriel, and St. Raphael. Although the Church acknowledges that there are seven Archangels according to Sacred Scripture and Sacred Tradition, because these three Archangels are the only angels named in Scripture, they are currently the only three who are officially recognized by name in Catholic doctrine."
http://www.catholic365.com/article/2094/the-catholic-teachings-on-the-angels-part-4-the-seven-archangels.html