Syriac

ˀalpā - thousand (LSyr. 22, SL 51)

PWS
*ˀalp- - thousand (Kogan 2015:70)

Direct identification with PS *ˀalp- ‘head of large cattle,’ taken for granted in Fox 2003:74, is semantically difficult. An eventual connection with Arb. ˀlf is worth considering (Kogan 2015: 71)