An, 'an, post. Of (possessive)
usage: Placed after a noun to mark that noun as the possessor of the nominal preceding it. Example: "Sulund (horse/mount) Madruesē (Madrus) an", meaning "Madrus' horse". First-person conjugations (see 'Inflection') can be used without a possessor noun to mean 'my' or 'our'.
etymology: Foundational root