Usage: 2 forms in 5 verses
Form Translated As     In Verse(s)
αγχιστείαν for his right of inheritance LXX.Ruth.4.7
for my inheritance LXX.Ruth.4.6
my right of inheritance LXX.Ruth.4.8
right of inheritance LXX.Ruth.4.7
αγχιστεία right of inheritance LXX.Neh.13.29

Liddell-Scott-Jones

ἀγχιστεία (agchisteia) right of inheritance G:N-F

ἀγχιστεία-εία, ,

(ἄγχιστος) close kinship, τοῦ γένους .[Refs 5th c.BC+]

__2 rights of kin, right of inheritance, [Refs 5th c.BC+]
__3 exclusion by descent, [LXX]

LSJ Scripture Refs: LXX.Neh.13.29