Wow! a Prefontaine is out there? I'd only really heard about your side of the family in passing from my grandpa Robert G Fortin and my nana Carolyn!
I have no idea if you will get this, Marcel, if your account is still active, etc, but thought I would try. Feeling nostalgic for the old family back in Maine (what's left of them, which sadly isn't much) I ran a search on my grandpa and found the link to your post on this site.
I'm sure I can add to your info gathering, at least a little...
Yes, Robert Fortin and Carolyn Emery did marry once upon a time. They had one child, Diane Lillian Fortin, my mom. My mom would go on to marry one Raymond Maurice Simmons, my dad (and my family name). They would have 4 kids: Daryl M, Jonathan D, Lori C, and myself -- named after my grampa Robert AND my grampa Walter. Now that's an honor! ;-)
My grampa...wow. I loved that guy so much. He was awesome, and the best grandfather a kid could ask for. Used to play checkers with me all the time, and wouldn't let me win! Take me swimming up to Sebago Lake or in the Presumpscot River which flowed through their property, bike riding, sledding. Take me down to the train tracks bordering the river to see the old Maine Central Railroad freight trains rumble by on their way through the White Mountains on up to St. Johnsbury, VT -- we'd count the freight cars together. He loved his family, loved his horses (they had 2), loved his wife, and loved the simple life.
Grampa was a fairly quite guy, but he spoke occasionally about his mom and dad (Guimond/Fortin); he loved his mom very much, and kept a photo of each of them on a little table beside his favorite sitting/pipe-smoking chair in the living room. He mentioned the Prefontaine family a time or two, but could not tell you much about that apart from how either his mom or dad came down from Canada on a sleigh of some sort during the winter? I think it was when he/she/both moved to the area. The details get a little foggy with time. I'm surprised I even remembered the sleigh!
My dear sweet grampa passed away quietly in his home August 17, 2001, his wife, a caregiver, and my sister Lori at his side. Of old age, I guess you would say; he lived to the grand age of 94.
My mother would follow him next, losing her fight against pancreatic cancer May 26, 2002. When the doctor originally diagnosed her disease in 2000, he told her to "get her affairs in order", code for "you don't have much time". She lived close to 3 years longer after that. She battled. She was a fighter. I still can't believe she's gone. It's been 10 years. I've lost so, so many members of my family. A brother. My parents. It's crushing. But I guess you find a way to cope and move on.
My nana would live on for another 4 years, passing on from rectal cancer in 2006. She still lived in their family home that Robert built while he owned/operated his business in nearby Westbrook, Fortin Furniture.
Sadly, we could not afford to retain the old "Fortin family home" and nearly 40 acres of land, and sold it to a neighbor and former friend of grampa. It least it's still with someone who knew my gramps well. Grampa would be pleased.
So, Marcel, what's your story? Where do you live now, how old are you, etc? I'm 47, live in San Rafael, CA, with my wife Lisa and our two boys, Lucas (5) and Jacob (4). Kind of old to be a daddy (!) but I love it.