Count John Eustace of Wurmbrand-Stuppach (German: Graf Johann Eustas von Wurmbrand-Stuppach) (1642 - 1684). He was the son of Count John Ernest Henry, and was the father of Count John Joseph William, Count Christian Siegmund and Count Casimir Henry. Since he predeceased his father, his eldest son John Joseph William inherited the County in 1694.