Rei in Fausset's Bible Dictionary
Remained faithful to David in Adonijah's rebellion. Ewald
makes Rei as Shimei, David's brother. Raddad (1 Kings 1:8).
Jerome (Quaest. Hebrew) makes him "Hiram the Zairite," i.e.
"Ira the Jairite."
Rei in Smiths Bible Dictionary
(friendly), a person mentioned (in 1Ki 1:8 only) as having
remained firm to David's cause when Adonijah rebelled. (B.C.
Rei in the Bible Encyclopedia - ISBE
re'-i (re`i, "friendly"; Rhesei): Rei, Shimei and the Gibborim
who belonged to David are listed among those who did not join
Adonijah in his attempt on the throne (1 Ki 1:8). The name is
very uncertain. Winckler (Geschichte, II, 247) identifies him
with Ira, the Jairite, who was a "priest to David" (2 Sam
20:26 the Revised Version margin); he tries to prove that this
Ira (or Jair) was a priest of Bethlehem. Stade (GVI, I, 293,
note 1) holds that Shimei and Rei were two officers of David's
bodyguard. Josephus (Ant., VII, xiv, 4) has ho Daouidou
philos, thus making Shimei a "friend," the courtier of 2 Sam
15:37; 16:16, and omitting Rei entirely. This would call for
an original reading re`h ha-melekh, or re`eh ha-melekh, and is
too wide a variant from the Massoretic Text. Assuming that Rei
belongs in the text, it is safe to conjecture that he was an
officer of the royal guard.
Horace J. Wolf