Juliane of Salm was the youngest daughter of Johann (1582-1630), Wild- und Rheingraf in Grumbach und Rheingrafenstein and Countess Anna Juliane von Mansfeld (1591-±1626), thus Juliane had been an orphan since around the age of 14.
Juliane married Count Palatine George Wilhelm on 30-11-1641 in his castle in Birkenfeld. He was 25 years her senior. Juliane gave birth within 2½ months of the wedding ceremony on 14-2-1642. The child had been fathered by Count Johann Ludwig of Salm-Dhaun (1620-1673) who belonged to another branche of the same family. On 30-10-1643, however, Johan Ludwig married another relative instead, Elisabeth of Salm-Neuviller (1620-1653).