Bach may refer to the following composers, members of a famous musical family, or others, not necessarily related:

Bach family

• Direct descendents of Johann(es) „Hans“ Bach (d.1626), father of Johann (*1604), Christoph (*1613), Heinrich (*1615). Some of these links are Wikipedia links, not IMSLP links.

“Erfurt Line”

• Johann Bach (1604–1673)
  • Johann Aegidius Bach (1645–1716)
    • Johann Bernhard Bach (1676–1749)
      • Johann Ernst Bach (1722–1777)

Line to Johann Sebastian

• Christoph Bach (1613–1661)
  • Johann Christoph Bach (1645–1693)
  • Johann Ambrosius Bach (1645–1695)
    • Johann Christoph Bach (1671–1721)
      • Johann Bernhard Bach (1700–1743)
    • Johann Jacob Bach (1682–1722)
    • Johann Sebastian Bach (1685–1750)
      • Wilhelm Friedemann Bach (1710–1784), known as the “Dresden Bach” and the "Halle Bach"
      • Carl Philipp Emanuel Bach (1714–1788), known as the “Berlin Bach” and the "Hamburg Bach"
      • Johann Christoph Friedrich Bach (1732–1795), known as the “Bückeburg Bach”
        • Wilhelm Friedrich Ernst Bach (1759–1845)
      • Johann Christian Bach (1735–1782), known as the “London Bach”

“Arnstadt Line”

• Heinrich Bach (1615–1692)
  • Johann Christoph Bach (1642–1703)
    • Johann Nicolaus Bach (1669–1753)
  • Johann Michael Bach (1648–1694), known as the “Gehrener Bach”
    • Maria Barbara Bach (1684–1720), Johann Sebastian’s first wife

See Bach-cantatas.com for a family tree.

Other Bachs (not related, or distant relation)

• August Wilhelm Bach (1796–1869)
• Christoph Bach (1835–1927)
• Johann Ludwig Bach (1677–1731), distant relative known as the “Meininger Bach”
• Johann Christian Bach @pianist^ (1743-1814) distant relative, son of George Michael Bach, nephew of Johann Ludwig Bach, and student of Wilhelm Friedemann Bach
• Johann Lorenz Bach (1695–1773) (somewhat distant cousin? Son of Johann Valentin Bach, and student of Johann Sebastian Bach)
• Johann Michael Bach (1745–1820), music theorist known as the “Wuppertaler Bach”, relation to Bach family unclear
• Leonhard Emil Bach (1849–1902)