Denning,Dinning,Dinnin,Dinnihy,Dennen,Denune,Denng,Denninge,Denney,Dennie,Danin,Denn,Dinan The surname has a strong representation in Greater Britian and Europe. In Ireland, the Counties Longford and Meaths area is strong while Scotland, England have large groups too. Continental Europe also has large groups of similar names sure to be connected. Our people moved a lot. The goal of this group is to connect some of the variants with this surname.
Let's just say any name based on DNN with an occasional N OR G; added vowel optional.

From my sample and my heritage of Ireland, Scotland & England.