Hi Ruth,
Here's the family coming to the US
http://goo.gl/WIDdKeYou can see the original on familysearch but this doesn't give further clues.
A Constance VandenAc is born 28 November 1870 in Brown county Wisconsin.
She's the daughter of Prosper and Victoria
See
https://familysearch.org/ark:/61903/1:1:XR61-BJMAnd here is Odile getting married to Arthur Pelkin on 20 January 1903 in Brown county, Wisconsin
https://familysearch.org/ark:/61903/1:1:XRVW-T6HMaybe this also helps you to solve the mystery.
Regards, Rian