🔼The name Haggi in the Bible
The name Haggi occurs just once in the Bible, although technically the name Haggi is spelled exactly the same as the name Haggai. It's just pronounced slightly different. Why that is, nobody knows.
Haggi is the second son of Gad, who is the seventh son of Jacob and the ancestor of one of the twelve tribes of Israel. Haggi became a bit of a tribal head himself, as his progeny is collectively referred to as the חגי, the Haggites, which is spelled the same as the name Haggi (Numbers 26:15).
🔼Etymology of the name Haggi
The name Haggi comes from the verb חגג (hagag), meaning to celebrate, hold a feast:
For a meaning of the name Haggi, Jones' Dictionary of Old Testament Proper Names reads Exultation (a curious rendition since Jones refers to the name Haggai, which he translates as Festival Of The Lord). NOBSE Study Bible Name List and BDB Theological Dictionary both read Festal.