🔼The name Shephupham in the Bible
The name Shephupham occurs only once in the Bible. In Numbers 26:39 Shephupham (שפופם) is listed as one of the sons of Benjamin, and the progenitor of the Shephamites (שופמי, and note the shift of the letter ו, waw and omission of the second פ, pe). Because of the discrepancy between the name Shephupham and the ethnonym Shephamites, some modern translations (KJV, Young, NIV) speak of Shupham in this verse.
It's not quite clear how Shephupham fits into the direct family of Benjamin, and several clues suggests that Shephupham was not a single person but rather a combination of the posterity of two ancestors, namely Muppim and Huppim (מפים וחפים according to Genesis 46:21, but note that Numbers 26:39 mentions a Hupham) or Shuppim and Huppim (שפים וחפם according to 1 Chronicles 7:12, but note that 1 Chronicles 8:5 mentions a Shephuphan). Something similar happened in modern times with, for instance, Czechoslovakia (Czech lands plus Slovakia) and Budapest (Buda, Obuda and Pest).
🔼Etymology of the name Shephupham
The name Shephupham may have originated from combining two other names, but as it turned out, it came to look quite like the noun שפיפן (shepipon), which denotes a kind of snake, from the assumed root שפף (spp):
For a meaning of the name Shephupham (or Shupham), Jones' Dictionary of Old Testament Proper Names reads Serpent. BDB Theological Dictionary doesn't interpret our name but does list it under the root שפף. NOBSE Study Bible Name List omits this name.