Factually correct with the name 'van Gogh' the 'gh' in Flemish (Dutch) is spelled more like a German 'ch' in your palate as in Hebrew or Suisse language. A strange snarling sound you normally don't create in English, only when you have a sore throat and try to scratch some slime to spit out - enough explained?
In German 'Gogh' usually is (mis)spelled like 'gog' in English and now for your liking, with the original correct spelling you could create two more sensationally biblical phrases - you got it already - namely
Gog & Magog
now you could add to the list:
Mother of Vincent van Gogh: Ma Gog(h)
whereas for Gog(h) alone
I have no clue
thanks for the smiles