PS

*-kVmV/-kVnV - your; you (genitive and accusative pronominal suffix, 2 pl.) (Kogan 2009:69)

Just as the singular forms, the plural of the pronominal suffix of the 2nd person is based on the element k- with the extension -m- or -n- combined with more or less expressed vocalic oppositions (Kogan 2009:69). The character of consonantal and vocalic oppositions in individual languages generally corresponds to the nominative forms.

Akkadian
-kina - your (genitive pronominal suffix, 2 fem. pl.) (GAG § 42 g)
Akkadian
-kunu - your (genitive pronominal suffix, 2 masc. pl.) (GAG § 42 g)
Arabic
-kum/-kumu - your; you (genitive and accusative pronominal suffix, 2 masc. pl.) (Fischer 2002 § 268)
Arabic
-kunna - your; you (genitive and accusative pronominal suffix, 2 fem. pl.) (Fischer 2002 § 268)
Geez
-kəmu - your; you (genitive and accusative pronominal suffix, 2 masc. pl.) (CDG 285)
Geez
-kən - your; you (genitive and accusative pronominal suffix, 2 fem. pl.) (CDG 286)
Tigre
-kum - your; you (genitive and accusative pronominal suffix, 2 masc. pl.) (WTS 389)
Tigre
-kən - your; you (genitive and accusative pronominal suffix, 2 fem. pl.) (WTS 389)
Tigrinya
-kum - your; you (genitive and accusative pronominal suffix, 2 masc. pl.) (Bulakh–Kogan 2013b:101)
Used as a polite form (Bulakh–Kogan 2013b:106).
Tigrinya
-kən - your; you (genitive and accusative pronominal suffix, 2 fem. pl.) (Bulakh–Kogan 2013b:101)
Used as a polite form (Bulakh–Kogan 2013b:106).