Aymar witnessed a charter of Count
Henry II of Champagne, husband of Queen
Isabella I of Jerusalem, in 1193, subscribing as
Azemarus Cesariensis dominus ("Aymar, Caesarean lord"). He subscribed a second royal act with the same title the next year (1194). The wife in whose right he held the title,
Juliana, is not herself recorded as the lady of Caesarea until 1197, when together they confirmed a grant made by her brother,
Walter II, on his deathbed. Between 1201 and 1213 he and his wife jointly issued a number of charters. He also witnessed a charter issued the regent
John of Ibelin in 1206. In 1208 he was part of the embassy dispatched to France by the
Haute Cour to find a suitable husband for the young queen,
Maria. He was present when that husband, John, was crowned at
Tyre in 1210. In 1212–13, Juliana and Aymar, "because of poverty" (
compulsi penuria), took out of a pair of loans from the Hospitallers. In the first loan, houses in Acre and Tyre, as well as the
casale (plural
casalia) of
Turcarme, were put up as collateral in return for 2,000
bezants. In the second, the
casalia of
Capharlet, Samarita and Bubalorum were put up for 1,000 bezants. Juliana never appears in a charter again after the loan of October 1213. ==Knight Hospitaller==