You should add the usage of "Late Greek" to this name, because the earliest known bearer was saint Glykeria from Heraclea (Thrace), who lived in the 2nd century AD:https://en.wikipedia.org/wiki/Saint_Glyceria (in English; Glyceria is of course the latinized form of her name)All known bearers of the masculine equivalent Glykerios (Glycerius in Latin) also lived in late Greek times, i.e. after the advent of Christianity. At least three of them are saints themselves. [noted -ed]
https://en.wikipedia.org/wiki/Saint_Glyceria (in English; Glyceria is of course the latinized form of her name)
All known bearers of the masculine equivalent Glykerios (Glycerius in Latin) also lived in late Greek times, i.e. after the advent of Christianity. At least three of them are saints themselves. [noted -ed]