🔼The name Sheshan in the Bible
There's only one man named Sheshan in the Bible. He was a son of Ishi, son of Appaim, who descended from Hezron of Judah (1 Chronicles 2:31). Sheshan is famous for giving his daughter to his Egyptian servant Jarha for a wife (1 Chronicles 2:35). This daughter is unnamed in verse 35, but perhaps it was the Ahlai mentioned in verse 31 (since Sheshan had no sons, only daughters — verse 34).
🔼Etymology of the name Sheshan
The name Sheshan is probably related to the word שושן (shushan), meaning lily, or else to any of the words in the following cluster:
For a meaning of the name Sheshan, NOBSE Study Bible Name List reads Whitish (which is an adjective, while our name doesn't seem to be one). Jones' Dictionary of Old Testament Proper Names proposes Lily. BDB Theological Dictionary does not offer an interpretation of this name.