"Furner" is one common misspelling of the surname "Fruner", today and probably in the past. Even when spelling the name for people today, some will hear "Fru" and others "Fur", for whatever reason...something to keep in mind if you are actually looking for real "Furners" and find a listing in a database...it may be a misspelled Fruner. (The reverse is also true.) The name "Fruner" is said to come from the Bavarian "Fruntner", farming families who lived in an Alpine/Dolomite mountain plateau known as the "Maso Frunt" in southern Bavaria/Tyrolian Austria (northern Italy today)in the 16th century. In the early 1600's the name began to be spelled "Fruner". The origins of "Furner" may be completely different and unrelated, or another "corruption" of the earlier, place-based surname.