'House of Judah' in the Bible

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

So now, let your hands be strong and be valiant; for your lord Saul is dead, and also the house of Judah has anointed me king over them.”

Ish-bosheth, Saul’s son, was forty years old when he became king over Israel, and he reigned for two years. But the house of Judah followed David.

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