Ion is a ♂ male name.
Ion is a Romanian and Basque variant of the name John, which is considered a short variant of Johannes or Johann. Besides, Ion is a name of the Greek mythology (ancestor of the Ionians).
Ion means “Yahweh is gracious” (from Hebrew “jô/יֹו” = referring to the Hebrew God + “chanan/חָנַן” = to be gracious/to show favor).