Ten lost tribes?

“Those from every tribe of Israel who set their hearts on seeking the Lord, the God of Israel, followed the Levites to Jerusalem to offer sacrifices to the Lord, the God of their fathers.” 2 Chronicles 11:16
There is a popular idea floating around in various Christian circles about the so-called ‘ten lost tribes of Israel’. So the theory goes, after the kingdom split in the times of Jeroboam and Rehoboam into the ten tribes of Israel in the north, and the two tribes of Judah and Benjamin in the south, when the Assyrians conquered the northern kingdom and took the people captive, never to be regathered, the ten tribes of the northern kingdom were supposedly lost. People who hold to this view then try to find linkages to these ten lost tribes in various European royal families etc., and/or spiritualise the list of the tribes of Israel given in the book of Revelation (Rev. 7:4-8).
In the Old Testament, the tribal names were used of both the people and the land that was originally allocated to each tribe by Joshua. But on several occasions, we see migrations of people within the nation (e.g. 2 Chr. 11:16, 2 Chr. 15:9). In actual fact, there were four tribes represented in the southern kingdom: Judah, Benjamin, Levi, and Simeon (who received territory within Judah’s territory). After the Babylonian exile, when some of the people of the southern kingdom returned to the land of Israel, the people are called ‘Israel’, implying that there were representatives of all the tribes present. In addition, we read in the New Testament about how Paul was desccended from the tribe of Benjamin (Rom. 11:1) and how Anna was descended from the tribe of Asher (Luke 2:36).
The truth is that there are no ‘lost tribes’. God knows who they are – and He does not lose anyone!