Rechab = "rider"

 n pr m
 1) father of Jehonadab in the time of king Jehu of the northern kingdom
    of Israel
 2) father of Malchijah, a leader of the district of Beth Haccerem and
    repairer of the wall of Jerusalem in the time of Nehemiah
 3) one of the 2 captains whom Ishbosheth took into his service and
    who conspired to murder him

 Rechabites = see Rechab "rider"

 adj pr
 4) descendants of Rechab