The similarity between the names of Elymians and Elamites is really interesting, but we know an Indo-European people with the name of Elymais also lived in the west of Iran, Elamites called themselves Haltamti, it is possible that the name of Elam in the Semitic sources is actually from the name of Elymais. In many ancient sources Elam/Susiana and Elymais were two different lands: http://www.perseus.tufts.edu/hopper/...ry=elymais-geo