חַגִּיChaggîy

proper name, masculine: festal

Pronunciation: khag-ghee' · Hebrew/Aramaic (Old Testament) · H2291

Meanings

1. son of Gad (Genesis 46:16; Numbers 26:15)

2. as substantive collective, with article (Numbers 26:15)

Same root

חָגַגchâgag · H2287properly, to move in acircle, i.e. (specifically) to march in asacred procession, to observe afestival; by implication, to be giddy
חַגִּיתChaggîyth · H2294Chaggith, a wife of David

Where it appears

Appears 3 times in the Bible.

Genesis 46:16 The sons of Gad were Zephon, Haggi, Shuni, Ezbon, Eri, Arodi, and Areli.
Numbers 26:15 These were the clans descended from the sons of Gad: The Zephonite clan, named after their ancestor Zephon. The Haggite clan, named after their ancestor Haggi. The Shunite clan, named after their ancestor Shuni.

See every passage

Genesis 46:16
Numbers 26:15

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).