My Grandma got pregnant at a very young age. Back then it was common for the babies to be taken away from the young mums, but her father didn't let that happen. She married a young man and they raised the baby together. The biological father wasn't ready to raise a child, I guess. My Dad grew up thinking that his "Dad" was his real father. I'm not sure at what age he found out, but after his "Dad" died, his mother gave him a contact number to find his real father.Dad finally got in contact with his real father in Denmark and so did his mother. Later that year my Dad travelled to Denmark for his (real) parents wedding.
This means, by blood my last name should be Brun (Brown).