No they didn't call it Palestine. Maybe in your antisemtic dreams. Now run along.
Of course they called Palestine, you traitorous creep.
Part of Greater Syria,
look at 1st Arab-Palestine congress.
It was called the Arab-
Palestine Congress
and took place in February 1919, during which joining a Greater Syria was proposed, among other things, e.g. stopping the Zionist invasion. There was a separate Syrian National Congress later that year in May. The Arab Kingdom of Syria was established in March of 1920 and was to encompass Palestine, Trans-Jordan, Lebanon, Syria and a substantial part of Iraq.
The French invaded the Kingdom in the late summer and occupied the Syrian and Lebanon part of the Kingdom. Most of the royal family fled to the Trans-Jordan part of the Kingdom (they were Hashemites) and made a deal with the British to keep that small part of the Syrian Arab Kingdom.
So, the idea that Palestine could become a part of a greater Syria lasted 18 months and never happened.
So what's your point?
Palestine has been called Παλαιστίν (PalaistÃni) in Greek, Palaestina in Latin, Filistin in Turkish or Falastin in Arabic at least since Herodotus called it Palestine in the 5th century BC in his 'Histories". Why you people want to deny this obvious fact is beyond me. I can see your need to delegitimize the Palestinian people as the native people of Palestine that the Jews expropriated of their land and currently oppress them, but this lie of your's is so easily debunked.