Hi there. I too, am trying to get information on my Teunissen roots. My mother's father's name was Joseph Tuenissen. He was one of 13 children. I am not sure of all the names of his siblings. Mary and Mathew, I think were a few of their names. Anyway, their parents' names were Johanna and Anton Teunissen. They came over from the Netherlands in the 1930's or 1940's to Canada. I don't know much about the family since my mom's dad died from Brights Disease in 1959 when she was only 4 years old. I do know that they lived in California for a while and also Montana, which is where I currently live. If you have any information, I would love to hear from you. I hope I have been of some help.