It's a patronymic surname, meaning it's derived from a given name. In this case, it comes from the given name "Tjalling," which is a Dutch form of the name "Tjalda" or "Tjalda".
It's a patronymic surname, meaning it's derived from a given name. In this case, it comes from the given name "Tjalling," which is a Dutch form of the name "Tjalda" or "Tjalda".