What is the House Of Judah?
The slightly smaller Southern Kingdom was made up of the Tribe of Judah & a mix of Levites and Benjamites.
It was also known as the Kingdom of Judah or House of Judah. These Southern Israelites (aka Judeans) were taken captive in ~587 BC and removed to Babylon. Only ~50,000 Judeans returned to Palestine ~70 years later.
The offspring of the House of Judah are called Jews.