The House of Granier (or Grenier ) was a prominent noble family during the Crusades founded at the beginning of the 12th century by Eustachius Granarius, a Flemish nobleman from the Diocese of Thérouanne in the County of Saint-Pol[a] who became lord of Sidon and Caesarea near 1110.

[2] The lordship was a coastal strip on the Mediterranean Sea between Tyre and Beirut.

Julian Grenier sold it to the Knights Templar after it was destroyed by the Mongols in 1260 after the Battle of Ain Jalut.

[3][4] His descendants continued to rule Caesarea until it became the property of John Aleman by right of his marriage to Margaret Grenier in 1238 or 1243.

[5] The Granier or Grenier family became extinct with two brothers: Balian II (who died at Botron in 1277) and John (who died in Armenia in 1289), sons of Julian Grenier (died in 1275) lord of Sidon and his wife Euphemia, daughter of Hethum I, King of Armenia.