Smith's Bible Dictionary (1863)
(an adder), one of the sons of Bela the first-born of Benjamin. (1 Chronicles 8:5) His name is also written SHEPHUPNAM (authorized Version “Shupham”), (Numbers 26:39) Shuppim (1 Chronicles 7:12,15) and Muppim.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
SHEPHU'PHAN (serpent), a grandson of Benjamin, 1 Chr 8:5; called Shuphara in Num 26:39, Shuppim in 1 Chr 7:12, 1 Chr 7:15, and Muppim in Gen 46:21.
Hitchcock's Bible Names (1869)
serpent