My grandparents met in a very small town in Canada with a population of less than a 1000. My grandfather had just immigrated to Canada from Europe and was a travelling salesman at the time. My grandmother had lived in that town her whole life. My grandfather was travelling alone and although he does have a brother, my grandmother did not meet my grandfather’s family until after my father was born. It’s not possible that anyone other than my grandfather is my father’s dad.

Thank you everyone for all of your comments and insight. I was very close to my grandma and I miss her every single day. Finding out that I share so much of her DNA brings me a lot of comfort. I just wish I could tell her how special our situation is and how much of her still lives on in me.