If you still have the information on the Joos's you referred to from WI, in your above message, i'd love to have it. Like someone said its not (I don't think) that common a name, and since yours, and mine both came from Switzerland to WI, perhaps theres a connection of some kind.
As for time line. I know that my uncle Ted Tuffli who was one of the children of Hans Tuffli and Katy Joos(born in WI)
Katy was the daughter of Martin Joos, and Magdaleana Arms.
Ted died in Oct 1988 in MA. He and his wife(my mom's sister) Helen lived all their married lives in Nahant MA, where they are both buried. (Nahant is in Essex Co in MA)
Ted's oldest sister died in 2005/06 at the age of 106. So I immagine that Hans and Katy were married aprox. 1905 or so, and guessing probably in their 20's(just a guess) .
I know that Magdalean m Cyril W Taylor who was born in England.
Barbara