1919 The Palestinians
Because Arabs until the 1960s spoke of Palestine as Southern Syria or part of Greater Syria, in 1919 the General Syrian Congress stated:
βWe ask that there should be no separation of the southern part of Syria known as Palestine.β
Source: Michael Curtis, Ed. THE PALESTINIANS: PEOPLE, HISTORY, POLITICS (New Brunswick: Transaction Books, 1975); http://www.agsconsulting.com/articles/peace2.htm