I have been doing research on the my family name of Wiegold.
There are several Wiegolds in England and Scotland (all of which are my relatives). On the research my family have done we found a Rosina Wygold but on her marriage certificate it is spelt Wiegold. There is also a link with the name Wigold. As you may have already found out, there was a Johannes Wigold who was a Pennsylvanian Pioneer. He was one of about 300 people who first emigrated to America. There are Wiegolds in America; maybe the spelling down the generations has altered.
In England there was also the spelling Wiegoht. We believe due to illetracy in the 1700/1800's the spelling of the surname Wiegold/Wigold/Wiegoht were mis-spelt.
There is also relatives from the Wiegold tree in Australia but on the female line so there are no Austrialian's named Wiegold.
If I find any information on Wygold I will let you know.