Named reference. It converts a sumti into another sumti. The converted sumti points to the referent the name of which is the referent of the unconverted sumti.
c1 (quoted word(s)) is the family name (as opposed to the given name) of family member c2=z2, used by namer/name-user c3. The family is bonded/tied/joined according to standard z3.
c1 (quoted word(s)) is a/the place name [inherent/inalienable site/place/position/situation/spot/location] of c2=s1 to/used-by namer/name-user c3 (person).