re’-kab, rek’-a-bits (rekhabh, rekhabhim): Rechab is the name of two men of some prominence in the Old Testament records:

(1) A Benjamite of the town of Beeroth, son of Rimmon (2Sa 4:2); he and his brother Baanah were "captains" of the military host of Ish-bosheth. On the death of Abner (2Sa 3:30) the two brothers treacherously entered Ish-bosheth’s house, when at noon he was resting and helpless, beheaded him, and escaped with the head to David at Hebron (2Sa 4:6-8). They expected to receive reward and honor from David for the foul deed, which left him without a rival for the throne of all Israel. But the just and noble-minded king ordered their immediate execution (2Sa 4:9-12), as in the case of the Amalekite, who asserted that he had killed Saul (2Sa 1). For some reason the Beerothites left their own town and fled to Gittaim, another town in Benjamin, where they were still living when the Books of Samuel were written (2Sa 4:3).

If the Rechab of Ne 3:14 is the same as this Kenite, then his descendant Malchijah, who assisted Nehemiah in rebuilding the wall of Jerusalem, may have abandoned the vow of his ancestors, for he was "ruler of the district of Beth-haccherem" (i.e. "house of the vineyard").