Notable people of Belgian origin with the last name include: Acar is a rare noble French last name from Bar-Sur-Aube dating back to the 15th Century, where it is found at different times in various localities, especially in Champagne and Burgundy.
In the Byblos district, the last name Acar developed in the 1820s as a nom-de-guerre given to a rebellious group of Maronite brothers because of their strong resistance against feudalism and tax inequality imposed upon Maronites by Bashir Shihab II.
According to an agreement reached on 17 May 1820, a referendum would be held among the inhabitants of Mount Lebanon regarding leadership of the emirate, as Bashir Shihab II had been deposed.
Among many other Maronite peasants, the Acar family, and clergymen of Byblos (as well as Maronite peasants and clergymen from Bsharri and Batroun) decided to take up armed resistance against Bashir's impositions, and garnered the support of the Shia Muslim Hamade sheikhs from Keserwan, being land owners in local villages around the Qartaba area, with connections to neighbouring, historically Shia, villages: Mazraat es-Siyad and Lassa.
The Acar family settled in the local towns and villages, predominantly: Mazraat es-Siyad, Abboud, Qartaba, and Jinné by the Adonis River.