Fenno seems to be a variant form of Old Norse Finnr meaning “Sámi, Finn, Laplander”, a byname used to refer to someone who came from Finland or was part of the Sami people (also known as Lapps). Although the origin behind finnr is uncertain it has been linked to Old Norse meaning “wanderer”.
I’ve also seen Fenno listed as a Frisian form of German names beginning with Germanic element frid meaning “peace”. Fenno is also an English surname of uncertain meaning. It’s possible it could be a variant of Fenn meaning “fen, marsh”, a locational name for someone who lived near a marsh.
Origin: Old Norse
- Fenna (Dutch, Frisian)