Nice thay he was able to find that info! So many families in the US are highly migratory so the are very few folks who can trace a local connection back further than 3 generations. Then you have to figure out where they were back east. And then back to Europe usually.
It can be a real mystery sometimes. And someone we get lucky and find someone like you who has done the research on your side!
1595! It is amazing that you got back that far! I have a French line we got back to around 1520 but that was research my Great Aunt did before WW2 and I think the documentation is probably lost now.