Main definitions of -ess in US English:

The suffix -ess has been used since the Middle Ages to form nouns denoting female persons, using a neutral or a male form as the base (such as hostess and actress from host and actor). Despite the apparent equivalence between the male and female pairs of forms, however, they are rarely equivalent in terms of actual use and connotation in modern English (consider the differences in meaning and use between manager and manageress). In the late 20th century, as the role of women in society changed, some of these feminine forms became problematic and are now regarded as old-fashioned, sexist, and patronizing (e.g., poetess, authoress, editress). The ‘male’ form is increasingly being used as the ‘neutral’ form, where the gender of the person concerned is simply unspecified

From French -esse, via late Latin from Greek -issa.

Middle English via French -esse from Latin -itia.