I can confirm that this name is somewhat archaic in the Netherlands and it was used mainly in the two provinces Frisland and Groningen. The pronunciation according to
Dutch phonetic rules is something like YOG-khuym (Warning: I don't know the actual pronunciation, I just follow the rules ...). It is a form of
Joachim.
http://www.meertens.knaw.nl/nvb/verspreiding/naam/Jogchum (Unfortunately, no verklaring!)
http://www.meertens.knaw.nl/nvb/verklaring/naam/Jogchem (Variant Jogchem exists, here's the explanation as a form of
Joachim, finally!)
--elbowin
This message was edited 4/29/2019, 7:47 AM