Hazel Kuhlthau who married Don Kiser died in Bend OR a few years ago. She,Don and their kids have been great friends through the years. Don will be visiting us here in southern California soon. I knew Hazel's parents well and her cousins. I have a book published in 1882 that mentions Phillip Kuhlthau, Milltown and a few others who were related. If you email me your email or snail address I can scan it for you and send it to you.
As to the Selovers -- I was adopted by my Dad James V Selover--so I haven't done much original genealogy work on the Selover family -- but my Dad did a lot going back to the 1600s when the 1st of what would come to be called the Selover-Slover family came to New York and then to New Jersey. The Selovers are all related.

As to the Riou genealogy -- I have done extensive research on my Breton family going back to the 16th century. Many of the French that came with Michelin were from Brittany.
I have visited the village where my mother was born a number of times. My eldest son is visiting there this week.