[gerdesj]

You should also bear in mind that English isn't quite that simple either. That г is a Greek gamma around here and hence "G". (it isn't really) Now it's funny you mention И -> y etc.

German and English and Dutch are often called Germanic languages. For example kirchegaard -> has an obvious route if you squint to: "church yard". Often y -> g or d -> g. So day becomes tag. The German word for (Eng) day is tag. "Guten tag" ... gooden dag/gudden tag and other spellings is middle english for "good day".

There is a town in England called Weybury. There is a town in Germany called Wegberg. G -> Y. Almost certainly that is bollocks but it makes a nice story. The burg and bury bit is probably right - a fortified town. Wey -> Weg is probably wrong even though way and weg (that means way in German too),

This will need a proper linguist to interject.