Which was the son of Matthat, which was the son of Levi, which was the son of Melchi, which was the son of Janna, which was the son of Joseph,
This is a genealogy: Joseph's son was Janna, then Melchi's son, followed by Levi's son, Matthat's son, and finally, this person's son.
* Work in progress - there may be occasional inaccuracies