And then there are people who have two last names separated by a space, but which cannot be considered a single last name. Their last name goes <paternal figur

And then there are people who have two last names separated by a space, but which cannot be considered a single last name. Their last name goes <paternal figure's paternal last name> <maternal figure's paternal last name>. Those who keep this naming standard for their children will pass on only their paternal figure's paternal name, which they consider their last name. A few I know had such issues they had to drop their maternal figure's paternal last name so that they would be called by their paternal figure's paternal last name, which was their preferred name when using only one last name (using both was similar to when someone uses a full middle name calling on a person).