Ynez /ynez/ [2 sylls.] as a girls' name is pronounced ee-NEZ. It is of French and Spanish origin, and the meaning of Ynez is chaste. Variant of Agnes (Greek) pure.hese girl names reached the apex of their popularity during the years 1900-1909 (usage of 0.5427%) and are now significantly less widespread, with versions such as Annis, Agnes, Ina, Ines and Una becoming somewhat dated. Displayed below is an analysis of the popularity of the girl name Ynez and corresponding names.