text: Ancestry and early years Gluck's earliest known ancestor is his great-grandfather, Simon Gluckh von Rockenzahn, whose name is recorded in the marriage contract (1672) of his son, the forester Johann (Hans) Adam Gluck and grandfather of Christoph. 'Rockenzahn' is believed to be Rokycany, located in the central part of western Bohemia (about 70 km southwest of Prague and 16 km east of Pilsen). The family name Gluck (also spelled Gluckh, Klugh, Kluch, etc.) likely comes from the Czech word for boy (kluk). Around 1675 Hans Adam moved to Neustadt an der Waldnaab in the service of Prince Ferdinand August von Lobkowitz.
  Gluck's father, Alexander, was born in Neustadt an der Waldnaab on 28 October 1683, one of four sons of Hans Adam Gluck who became foresters or gamekeepers. Alexander served under Philipp Hyazinth von Lobkowitz, the son of Ferdinand August von Lobkowitz, during the War of Spanish Succession, and, according to Gluck family tradition, rose to the level of gunbearer to the great general of the imperial forces, Eugene of Savoy. In 1711 Alexander settled outside Berching as a forester and hunter in the service of the monastery Seligenporten, Plankstetten Abbey, and the mayors of Neumarkt in der Oberpfalz. He took the vacant position of hunter in Erasbach in 1711 or 1712 (his predecessor had been found shot in the forest).