What does Jonathan mean?
From Hebrew Yehonatan, combining yeho (a form of Yahweh) + natan 'to give' — 'Yahweh has given'. A 'gift of God' name framed as God's act of giving.
What does Matthew mean?
English form of the Hebrew name Mattityahu (Mattathias), from mattath 'gift' + yah, a short form of the divine name Yahweh. The structure is 'gift of God': 'gift' + the name of God.