nomad (n.)

"a wanderer, one of a tribe of people who have no fixed abode," 1550s (in plural, nomades), from Middle French nomade (16c.), from Latin Nomas (genitive Nomadis) "wandering groups in Arabia," from Greek nomas (genitive nomados, plural nomades) "roaming, roving, wandering" (from place to place to find pasturage for their flocks or herds), related to nomos "pasture, pasturage, grazing," literally "land allotted," from PIE root *nem- "assign, allot; take."