> it was for them somewhat problematic at times that the siblings had different surnames (Björnsdottir and Björnsson), as people don't assume they're family, an

> it was for them somewhat problematic at times that the siblings had different surnames (Björnsdottir and Björnsson), as people don't assume they're family, and especially not that the parents both had different surnames again. I've heard similar things with certain eastern European countries (Bulgarian has different forms for males vs females: Ivanov vs Ivanova), and also with various Indian populations where the child's last name is just the father's first name. Meanwhile I have the more mundane option where my father's first name is just my middle name.