Georg Ernst was Captain (in 1625), then Major (in 1641) of the Army of the Republic of the United Netherlands.
His first wife was countess Magdalene, the daughter of Arnold III of Bentheim, Limburg and Bronckhorst.
They had one daughter: Mary Magdalene (d. 1707), who married Henry of Nassau-Siegen (d. 1652).
After Magdalena's death, Georg Ernst married in Terborg, on 13 January 1636, to countess Sophie Margarete (1610-1665), a daughter of Count John VII of Nassau-Siegen.
She was a titular countess of Nassau, Katzenelnbogen, Vianden and Diez and Lady of Beilstein.