Zephaniah the Great Great Grandson of King Hezekiah

Zephaniah the son of Kushai a Kushai means Ethiopian that he comes from an African descent and we know there were many Jews living in Ethiopia after the Babylonian captivity. On one line he appears to be Ethiopian and the other line he is a fourth generation down from King Hezekiah but it says that he's a contemporary with King Josiah now none of these names make sense unless you've got a chart in front of you or else you have a really good memory. Zephaniah unlike the last few minor prophets actually gives us his genealogy, which some scholars think was meant to say I'm adopted into the tribe too or my people have lived elsewhere just like Ruth