>From Middle English kide, from Old Norse kið (“young goat”), from Proto-Germanic *kidją, *kittīną (“goatling, kid”), perhaps from Proto-Indo-European *gʰaydn-, *ǵʰaydn- (“goat”) or Proto-Indo-European *gidʰ- (“kid, goatling, little goat”). Compare Swedish and Danish kid, German Kitz and Kitze, Albanian kedh and kec. The sense of child has been in use since the 1590s as cant, and since the 1840s in informal use.[1][2]
not seeing it being an americanism tbg