Yann is a ♂ male name.
Yann is a Breton form of John, which derived from the Greek name Iōannēs / Ἰωάννης, which in turn is derived from the Hebrew name Jochanan / יוֹחָנָן.
Yann means “Yahweh is gracious” (from Hebrew “jô/יֹו” = referring to the Hebrew God + “chanan/חָנַן” = to be gracious/to show favor).