Thierry d'Orca (French: Thierry d'Orgue or Their d'Orguenes, Latin: Theodoricus de Orca, before 1174–1207) was Lord of Arsuf by marriage in the Kingdom of Jerusalem.
Thierry was probably a French knight who came with the Third Crusade to the Holy Land in 1190.
It was among the retinue of Count Henry II of Champagne, who ascended as King of Jerusalem in 1192.
[2] d'Orca died in 1207 without any heirs.
After his death, his widow married with John of Ibelin, the "Old Lord of Beirut."