How did Bach sign all of his music?

Johann Sebastian Bach typically signed his music with the initials "J.J." at the beginning, which stands for "Jesu Juva," meaning "Help me, Jesus." At the end of his compositions, he often wrote "S.D.G.," which stands for "Soli Deo Gloria," meaning "To God alone be the glory." This practice reflected his deep religious faith and the importance he placed on dedicating his work to God.