My gggg-grandfather was John Jacob Yeakley (b. 1740), brother of George Yeakley (b. abt. 1737).
After rigorous study and research, including ship records, and Swiss records, and all kinds of microfilm there is no longer a shadow of a doubt that Benedict Youghli/Juchli/Juchli/Jugli was NOT the father of John Jacob and George Yeakley. According to Swiss records Benedict had a daughter Johanna, and a son Abraham. His wife's name was Magdalina Keusen. She stayed in Switzerland with the children when Benedict first came to the colonies. In records, both John Jacob and George's last name is Yeakley--no more, no less.
Also, the 'Counting Kindred' book has been proved wrong. George Yeakley, according to legal records, married Anna Laucks, and George Fegley married Anna Deppen.
I hope this doesn't upset your genealogical applecart too badly, but, for years there have been so many false notions put forth, so long, that many are now accepted as fact. They are simply not true.