dédoʰ - 1. paternal uncle; 2. father-in-law (LS 123; CSOL I 525; CSOL II 443; Naumkin et al. 2015a:66)

An eventual relationship with Akk. dādu ‘love-making; object of love, darling, favorite’, Hbr. dōd ‘beloved; love’ is also conceivable