Where does the name Farage come from?

I have often found myself wondering about the name Farage.  There is the point about how it should be pronounced which I don’t mean.  I wonder where the name comes from.

I’m reading The Periodic Table by Primo Levi, an Italian Jew who survived incarceration in Auschwitz during WW2.  He claims that an Italian bricklayer working on the site gave him food which saved his life.

The part where he lists out what he knows about who his ancestors were throws up a name which caught my eye.  The name is Jarach.  He writes –

The name of the town Lunel near the mouth of the Rhone between Montpellier and Nimes was translated into the Hebrew ‘yareakh’ – meaning ‘Moon’ or luna in Italian, and from this derived the Jewish-Piedmontese surname Jarach.

I don’t think the name Nigel Moon would have quite the cachet of Nigel Farage.

The letter J can easily switch to H or F, and ‘ch’ to ‘ge’.  It doesn’t mean he’s crypto-Jew necessarily as that would only pass through the maternal side.  Nor does it exclude the possibility.  His father is a stockbroker in the City of London.  It’s not easy to get a picture.