PCS

*gady- - kid (SED II No. 76; Kogan 2011: 206; Kogan 2015: 184)

For a tentative comparison with the verbal root *gdy ‘to cut’ v. DRS 100‒101
For a possible connection with PIE *gʰaid- v. Gamkrelidze–Ivanov 1984:872

Akkadian
gadû - kid (CAD G 9, AHw. 273)
Late Babylonian - seems to be a borrowing from Aramaic.
Ugaritic
gd/gdy - kid (DUL 295)
Phoenician
gdˀ - goat (Tomback 1978: 63, Krahmalkov 2000: 136)
Hebrew
gədī - kid (of goat or sheep) (HALOT 178)
Old Aramaic
gdh - goat (DNWSI 213)
Official Aramaic
gdy - kid (DNWSI 1239)
Jewish Palestinian Aramaic
gdī - kid (DJPA 121)
det. gdyyh
Jewish Babylonian Aramaic
gadyā - young goat, kid (DJBA 260)
Syriac
gadyā - kid (LSyr. 104, SL 205)
Mandaic
gadia - kid, young goat, Capricorn (MD 73)
Maalula
γaḏya - Böckchen (dwarf antelopes) (GNDM 29)
Arabic
ǯady- - kid (BK 1 267, Lane 393)
Geez
gadəy - capricorn (CDG 183)
Borrowing from Arabic.