Arab origin of the name Aín Curiosity · Aín, La Plana Baixa, Castellón Image of Aín, not of the place itself. The name Aín derives from the Arabic Ayn, meaning spring or source; the municipality was conquered by Jaime I in 1239. After the conquest, the Muslim population remained in the area under the jurisdiction of the qadi of Eslida, as recorded in the carta puebla of 1242. Coexistence broke down in the early 16th century, when the inhabitants were forced to be baptized under threat of death or exile, which led to a Morisco uprising in 1526 and, finally, to the expulsion of the Moriscos in 1609. Photo: Jrpuig (CC BY-SA 4.0) What to see and do in Aín