Name Posthuma Gender Feminine Usage Medieval English (?), English (Archaic) Other Forms FormsPostuma Edit Status Status Meaning & History Feminization of POSTHUMUS. (Cf. POSTUMA.) This was used as a second or third name to indicate the child's father had died before her birth, e.g. Gulielma Maria Posthuma Springett (1644-1694), the wife of William Penn, founder of Pennsylvania.