Hi there.... My family COUCHOIS.....also used CUSHWAY on Mackinac Island for the boat business Name.....My family was from the Island, Cheyboygan, Grand Rapids and Lansing areas...That I know of....I believe the Couchois and Cauchois are related as I think that when they signed coming over on the boats early on from France, then moving to the Canada area before heading to the island...that the O's and A's were often confused because of the penmanship....However I don't recognize the names you posted.....I am sorry that I can't help anymore....I wished I knew how to connect the dots...because I am certain there is a connection...
If I can help in any way please let me know.....
I will be glad to answer any questions you may have..
Thanks
C