Wikipedia
Mattan
Mattan (alternative spelling: Matan, , ) is a Hebrew name, mostly for males, coming from the word 'gift' and literally means "giving". It is part of the title of the Jewish holiday of Shavuot that is also known as "Z'man Mattan Torah" meaning the "time [of the] giving [of the] Torah."
A Biblical reference for a Mattan as a given name is the story told in Books of Kings about the Baal priest Mattan, killed by the people of the Kingdom of Judah during a revolution. In the Gospel of Matthew, Matthan is the paternal grandfather of Joseph, father of Jesus.
King Zedekiah birth name was originally Mattanyahu.