14 The same thing is found in the writings of St. Jerome where he makes the following statement amidst various interpretations of Mary's name: "We should realize that Mary means Lady in the Syrian Language." After him St. Chrysologus says the same thing more explicitly in these words: "The Hebrew word 'Mary' means 'Domina.' The Angel therefore addresses her as 'Lady' to preclude all servile fear in the Lord's Mother, who was born and was called 'Lady' by the authority and command of her own Son."
Source: Ad Caeli Reginam (Vatican.va)