nomad (n.)

1550s, from Middle French nomade (16c.), from Latin Nomas (genitive Nomadis) "wandering groups in Arabia," from Greek nomas (genitive nomados, plural nomades) "roaming, roving, wandering" (to find pastures for flocks or herds), related to nomos "pasture, pasturage, grazing," literally "land allotted," from PIE root *nem- "assign, allot; take."