The Sabines (ˈseɪbaɪnz, , ˈsæbaɪnz, ; Sabini; Sabini, all exonyms) were an Italic people who lived in the central Apennine Mountains of the ancient Italian Peninsula, also inhabiting Latium north of the Anio before the founding of Rome.
The Sabines divided into two populations just after the founding of Rome, which is described by Roman legend. The division, however it came about, is not legendary. The population closer to Rome transplanted itself to the new city and united with the preexisting citizenry, beginning a new heritage that descended from the Sabines but was also Latinized. The second population remained a mountain tribal state, coming finally to war against Rome for its independence along with all the other Italic tribes. Afterwards, it became assimilated into the Roman Republic.
The Sabines derived directly from the ancient Umbrians and belonged to the same ethnic group as the Samnites and the Sabelli, as attested by the common ethnonymous of Safineis (in ancient Greek σαφινείς) and by the toponyms safinim and safina (at the origin of the terms Samnium and Sabinum). The Indo-European root Saβeno or Sabh evolved into the word Safen, which later became Safin. From Safinim, Sabinus, Sabellus and Samnis, an Indo-European root can be extracted, sabh-, which becomes Sab- in Latino-Faliscan and Saf- in Osco-Umbrian: Sabini and *Safineis.
At some point in prehistory, a population speaking a common language extended over both Samnium and Umbria. Salmon conjectures that it was common Italic and puts forward a date of 600 BC, after which the common language began to separate into dialects. This date does not necessarily correspond to any historical or archaeological evidence; developing a synthetic view of the ethnology of proto-historic Italy is an incomplete and ongoing task.
Linguist Julius Pokorny carries the etymology somewhat further back. Conjecturing that the -a- was altered from an -o- during some prehistoric residence in Illyria, he derives the names from an o-grade extension *swo-bho- of an extended e-grade *swe-bho- of the possessive adjective, *s(e)we-, of the reflexive pronoun, *se-, "oneself" (the source of English self).