Of course "Palestine" was mentioned prior to the misfortune of Arafat copying his Uncle in using the Arabs from that REGION as a means of amassing a personal fortune and aggrandising himself.

Palestine refers to a geographic area comprising a collection of districts of what was the former Ottoman Empire.

Here Raggy is a map of the Ottoman Empire around 1900 - you will find no place on it called "Palestine":

Ottoman Empire 1900

Palestine has never existed as a country, Arafat invented it in the early 1970s in order to make money - this he did very successfully as his bank balance clearly shows - but Arafat's "Palestinians" never saw any benefit of it because it was in the best interests of the "Palestinians Leaders" to keep their people poor, impoverished and bereft of any hope, as in that condition they can be wound up and played like a cheap clockwork toy and as biddable as a well trained dog.