=Foss Name Meaning=
English: variant spelling of Fosse. A moat or defensive ditch in a fortification, usually filled with water. Danish: from fos, vos ‘fox’; a nickname for a sly or cunning person or a habitational name for someone living at a house distinguished by the sign of a fox. Norwegian: habitational name from a farmstead so named from Old Norse fors ‘waterfall’, examples of which are found throughout Norway.
Altered spelling of German Voss or the Dutch cognate Vos.
===Source: Dictionary of American Family Names ©2013, Oxford University Press===
from Ruth Marion Nederik
Martha Olive Downs Foss was my 3rd great grandmother. Many Foss's in my family from Portsmouth NH Settler and pioneers. Also Rye NH. Came from England,and Ireland and Scotland