PS

*niḥnū̆/niḥnā̆ - we (Kogan 2009:67, CDG 395)

Akkadian
nīnu - we (CAD N₂ 239, AHw. 791)
Hebrew
ˀănaḥnū - we (HALOT 71)
The initial ˀă- is due to the analogy with the 1 sg. forms (see ˀānōkī, ˀănī).
Biblical Aramaic
ˀănaḥnā - we (HALOT 1818)
Jewish Babylonian Aramaic
ˀănan - we (DJBA 145)
Syriac
ḥnan - we (LSyr. 242, SL 472)
Mandaic
anin, anˁn - we (MD 27)
Turoyo
aḥna - wir (we) (JL 157)
Arabic
ˀiḥnā - we (BK I 19)
Dialectal form with the initial *ni- being replaced by prothetic ˀi-.
Arabic
naḥnu - we (BK II 1217)
Geez
nəḥna - we (CDG 395)
Tigre
ḥəna - we (WTS 82)
The initial sequence *nə- was lost (perhaps, due to the haplology): *nəḥna > ḥəna. This development is paralleled by Soq. ḥan (Bulakh–Kogan 2013b:99).
Tigrinya
nəḥna - we (TED 1305)
Amharic
əñña - we (AED 1257)
Argobba
ənna - we (Bulakh–Kogan 2013b:94)
Harari
əňňa/əňňāč - we (EDH 29)
The nominal plural marker -āč may be optionally attached to the pronoun.
Selti
əňa - we (EDG 55)
Gafat
ənni - we (Bulakh–Kogan 2013b:95)
-i in auslaut is noteworthy (see Bulakh–Kogan 2013b:99).
Masqan
inna - we (EDG 55)
Soddo
əňňa - we (EDG 79)
Mehri
nḥa - we (ML 291)
Jibbali
nəḥa - we (JL 186)
Eastern Jibbali form.
Jibbali
nḥan - we (JL 186)
Central Jibbali form.
Soqotri
ḥan, ḥánhen - we (LS 182; CSOL I 560; CSOL II 480)