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."
Read More about Rei in Fausset's Bible Dictionary