'House of Judah' in the Bible

Then the men of Judah came, and there they anointed David king over the house of Judah. They told David: “It was the men of Jabesh-gilead who buried Saul.”

Therefore, be strong and courageous, for though Saul your lord is dead, the house of Judah has anointed me king over them.”

Saul’s son Ish-bosheth was 40 years old when he began his reign over Israel; he ruled for two years. The house of Judah, however, followed David.

The length of time that David was king in Hebron over the house of Judah was seven years and six months.