In 1102 Dagobert of Pisa was deposed as Patriarch by the papal legate, Cardinal Robert of Paris, on charges of misconduct brought by the King of Jerusalem, Baldwin I.
When the legate asked for a candidate to be the new patriarch, the Palestinian bishops suggested Ehremar, who was known for his piety and charity.
Baldwin was happy to accept the appointment as he knew that Ehremar, unlike Dagobert, would not set the claims of the church against his power as king.
Shortly afterwards, he came to assist with the conquest of Jaffa at Baldwin's request with the True Cross to encourage the troops, and one hundred and fifty men he had recruited.
Adrian Fortescue, writing in the Catholic Encyclopedia describes Ehremar as an "anti-patriarch" as his appointment was not ratified by the pope.