Nomad
late 16th century: from French nomade, via Latin from Greek nomas, nomad- ‘roaming in search of pasture’, from the base of nemein ‘to pasture’.
wiktionary
From Middle French nomade, from Latin nomas(“ wandering shepherd”), from Ancient Greek νομάς(nomás, “ roaming, wandering, esp. to find pasture”), from Ancient Greek νομός(nomós, “ pasture”). Compare Numidia.
etymonline
nomad (n.)
"a wanderer, one of a tribe of people who have no fixed abode," 1550s (in plural, nomades), from 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").