Haggith is a biblical character, one of the wives of David

David

David was the second king of the united Kingdom of Israel according to the Hebrew Bible and, according to the Gospels of Matthew and Luke, an ancestor of Jesus Christ through both Saint Joseph and Mary...

. Her name means "festive."

Haggith is mentioned in 2 Samuel

Books of Samuel

The Books of Samuel in the Jewish bible are part of the Former Prophets, , a theological history of the Israelites affirming and explaining the Torah under the guidance of the prophets.Samuel begins by telling how the prophet Samuel is chosen by...

 3:4, 1 Kings

Books of Kings

The Book of Kings presents a narrative history of ancient Israel and Judah from the death of David to the release of his successor Jehoiachin from imprisonment in Babylon, a period of some 400 years...

 1–2, and 1 Chronicles

Books of Chronicles

The Books of Chronicles are part of the Hebrew Bible. In the Masoretic Text, it appears as the first or last book of the Ketuvim . Chronicles largely parallels the Davidic narratives in the Books of Samuel and the Books of Kings...

 3:2. She only appears as the mother of Adonijah

Adonijah

Adonijah was the fourth son of King David according to the book of Samuel , which is contained in the Bible.-Life:After the death of his elder brothers Amnon and Absalom, he became heir-apparent to the throne, but Solomon, a younger brother, was preferred to him. Adonijah, however, when his father...

, the fourth of David's sons, born (according to 2 Samuel 3) in Hebron, while David was fighting Saul

Saul

-People:Saul is a given/first name in English, the Anglicized form of the Hebrew name Shaul from the Hebrew Bible:* Saul , including people with this given namein the Bible:* Saul , a king of Edom...

.

While Adonijah is usually described in the Bible as "the son of Haggith," there is no suggestion that his mother was involved in his attempt to gain the throne, or with his (likely politically motivated) attempt to take Abishag

Abishag

According to the Old Testament, Abishag was a young woman of Shunem, distinguished for her beauty. She was chosen to be a helper and servant to David in his old age. Among Abishag's duties was to lie next to David and keep him warm; however, David did not have sexual relations with her...

, his father's concubine.