PArm

*ḥad- - one (Kogan 2015: 399–400)

Outside Aramaic, aphaeresis of ˀa- in PS *ˀaḥad- ‘one’ is regular in some varieties of modern EthS (v. EDG 322 under Sel. Zwy. had).

PS
*ˀaḥad- - one (CDG 12, Kogan 2015: 34)
Level?

Samalian
ḥd - one (DNWSI 32)
f. ḥdh
Deir Alla
ḥd - one (DNWSI 32)
Old Aramaic
ḥd - one (DNWSI 32)
Jewish Palestinian Aramaic
ḥad - one, someone, certain (DJPA 187)
Jewish Babylonian Aramaic
ḥaḏ - one (DJBA 430)
Syriac
ḥad - one (LSyr. 215, SL 413)
Mandaic
had - one, single (MD 116)
Turoyo
ḥa - eins, einer (one) (JL 20)