“JMJ” is an abbreviation that stands for “Jesus, Mary, Joseph.” It is often used by Catholics as a form of devotion and as a way to invoke the Holy Family. The abbreviation is commonly found at the beginning of letters, notes, and other written materials, particularly in contexts related to faith, education, and religious communities. It serves as a reminder of the importance of Jesus, Mary, and Joseph in Christian teachings and is also used as a blessing or prayer for guidance and protection.