The lexica converge on the judgment that the derivation of רְאוּבֵן is unresolved. Gesenius (Thesaurus philologicus criticus linguae Hebraeae, 1247b) supplied the gloss "behold ye, a son!", parsing the form as the plural imperative רְאוּ plus בֵן, and BDB reproduces that gloss while registering with a pointed editorial "(!)" that Genesis 29:32 instead ties the name to רָאָה יְהוָה בְּעָנְיִי; HALOT and DCH likewise catalogue the name without adjudicating its origin. The traditional parsing is awkward, since an imperative plus an indefinite noun is not a normal Hebrew name pattern, and it does not match the text's own explanation. The older summary tradition is blunt: Hastings, s.v. "Reuben", concludes that numerous theories have been advanced "but no conclusion that can be accepted has been reached." Genesis commentators from Gunkel through Skinner, Westermann, Wenham, Sarna, Hamilton, and Alter treat 29:32 as paronomasia within the patterned sequence of Leah and Rachel birth namings in Genesis 29:31 to 30:24; Sarna observes that Leah's first two sons replicate a pair of verbs of divine attention, רָאָה for Reuben and שָׁמַע for Simeon. Three alternative lines of analysis are live. First, the versional evidence: Josephus consistently writes Ῥούβηλος and glosses it as ἔλεον τοῦ θεοῦ, and the Peshitta form is reported as Rabil or Rubil, so several witnesses end the name in lamed rather than nun; because the two letters are readily confused in Paleo-Hebrew script, some have posited an original theophoric Reʾûbēl with בֵן a secondary Hebraization, though the specific reconstructions of Redslob ("flock of Bel") and of Cheyne (a corruption of Jerahmeel) are rejected as arbitrary. Second, Noth's onomastic framework (Die israelitischen Personennamen, 1928), as systematized by Rechenmacher (Althebräische Personennamen, 2012), classes the name as profane rather than theophoric and prefers either a replacement name (Ersatzname) from a root rʾb meaning to repair or set right, or a greeting name. Third, comparative Semitic proposals: BDB following Dillmann connects an Arabic word for "lion", Sarna notes South Arabic raʾban "a chief" as fitting for a firstborn, and Cheyne and Black adduce a Minaean tribal name r-b-n that would make Reuben a clan designation rather than a personal name. No epigraphic attestation of the personal name is secure, whether in the Amarna corpus or the Egyptian topographical lists. On the tribal side, Gevirtz analysed the poetics of the deathbed reprimand of Genesis 49:3-4, where the disputed פַּחַז is read traditionally as "unstable" but by many as "reckless, wanton", which better suits the sexual offense; Cross argued from Reuben's fixed genealogical primacy, the "divisions of Reuben" in Judges 5:15, the Transjordanian sanctuary traditions, and the petition of Deuteronomy 33:6 that Reuben was genuinely dominant early and collapsed by the eleventh century, while Na'aman and Finkelstein read the tribal geography as a later construction keyed to Assyrian provincial boundaries and note that the Mesha Stele names the men of Gad at Ataroth but never Reuben. The Chronicler alone states the transfer of the birthright explicitly (1 Chronicles 5:1-2). In later reception the Testament of Reuben and Jubilees 33 expand Genesis 35:22 into an exemplum against lust, studied by Kugel and by Shinan and Zakovitch, while rabbinic tradition rehabilitates Reuben as the first penitent.