Surnames in Portugal are quite complicated.
Portuguese actress and model Victoria Guerra. Her full name is Victoria Deborah Lark Guerra.
The surnames of many local residents consist of 2 parts: the first one comes from the father, the second one comes from the mother. In some families, apart from parents’ surnames, they also add the surnames of grandparents, which are also double. It all makes one long name, like wagons on a train. That’s why the Portuguese are the owners of very long surnames that are difficult to both remember and pronounce. By the way, first names are often double too — such as Maria-Louise, for example.