Akkadian

gadû - kid (CAD G 9, AHw. 273)

Late Babylonian - seems to be a borrowing from Aramaic.

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