Reconstruction talk:Proto-Germanic/uhnaz

Can someone explain where *uhwnaz comes from, because no such word is actually mentioned in Kroonen's dictionary, and he outright suggests that *ufnaz was the original form based on linking it to Hittite happen-, Greek ipnos and Old Prussian wumpnis. 80.192.8.213 21:43, 22 June 2016 (UTC)