I think a lot were Jordanians, or even Egyptians.
Just Arabs, Jordanians and Egyptians. But a great many South Syrians, which are Syrian Arabs. Syrians who came to work, after the SykesPicot Agreement in 1920 France took over administration of Syria, created a new state, Syria and refused to let the Syrians who worked in Palestine, the future Jewish State, return. Thus South Syrians.