Easton's Bible Dictionary (1897)
The shining one, or sunny, the secretary of Rehum the chancellor, who took part in opposing the rebuilding of the temple after the Captivity (Ezra 4:8, 9, 17-23).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
SHIM'SHAI (sunny), the scribe or secretary of Rehum the chancellor. He joined in opposing the rebuilding of the temple under Zerubbabel. Ezr 4:8-9, 2 Sam 21:17, Heb 12:23.
Hitchcock's Bible Names (1869)
my son