Eustach

Eustach is the name of the following people:

• Eustach I (Boulogne) (1010-1049), Count of Boulogne
• Eustach II (Boulogne) (around 1020 – around 1085), Count of Boulogne
• Eustach III. (Boulogne) (before 1060 – after 1125), Count of Boulogne and Count of Lens
• Eustach IV (Boulogne) (around 1130–1153), Duke of Normandy and Count of Boulogne
• Eustach I. Garnier († 1123), crusader, lord of Caesarea and count of Sidon
• Eustach of Flanders († 1216), regent of the Kingdom of Thessaloniki

See also:

• Eustache
• Eustachius

This is a disambiguation page for differentiating between several terms identified with the same word.