Akkadian

māru - son (CAD M₁ 308, AHw. 614)

Also mārtu ‘daughter’ (CAD M₁ 300, AHw. 614).

PS
*marˀ- - man; son; lord (Fronzaroli 1964: 28–29, 42; Kogan 2005c: 532; Kogan 2006a: 482; Kogan 2011: 233; Kogan 2015: 44, n. 111)