Caimari is an ancient name and its origins have been obscured by the passing of time. The most prestigious experts in toponymy have been unable to fully confirm any of the hypotheses regarding the original meaning of Caimari. The word has also changed with the passing of time (Caymarix le Aben-leube, Caymarix Labelembe or Caymaritx Labenleube, Queymaritx, Caymari).
But the main hypothesis is the one that maintains that the name “Caimàritx” means a “series of caves”. The theory is based on the fact that phonetically “sm” can become “im”. The theory suggests that Caimari derives from “casmari”, which in turn comes from “chasma” (abyss in Greek).
Source: “Caimari, apuntes históricos y geográficos” by Antoni Ordines Garau
Finally, a 19th century hypothesis worth mentioning maintains that “Caimari” derives from the Latin anthroponym “Cayus Marius”, the name of a famous general who might have taken part in the conquest of Mallorca. In fact, the Roman remains in the area of Fornassos, near Caimari, are evidence of Roman presence in the area.
The oldest settlement in the Caimari area dates approximately from the Pretalaiotic period (2500-1400 BCE), as evidenced by the prehistoric remains found in caves and sites sheltered by the mountains in Caimari. Settlements like Fornassos continued to be occupied after the conquest of Mallorca by the Romans in 123 CE. Quite possibly Caimari was not conquered by the Catalans until the campaign that ran from 1230 to 1231. In May and June 1232 the King divided Caimari between the men of Barcelona. He gave the arab farm of Caymarix le Aben-Leube to Guillem Boba and the farm of Binimala (covering 8 “jobadas”) to Berenguer de Montcada. The estate of Son Albertí is quite possibly built on the farm of Caimari.