From Longman Dictionary of Contemporary Englishgodsongod‧son /ˈɡɒdsʌn $ ˈɡɑːd-/ noun [countable] RRCa male godchild
Examples from the Corpus
godson• My nephew and godson Peter loves board games and sports, so these are more prevalent in his home than in mine.• Then, spurred by the thought of Wurst and chips for lunch, my son and godson overtook me.• Avitus was also related, if only as godson, to bishop Mamertus, brother of the theologian Claudianus.• He was arrested for theft on the same day as my godson, each in a different part of Brighton.• Another staunch supporter is Wulstan Atkins, Elgar's godson. 