Do you know in Brazil everyone has two surnames not linked by a hifen and it is not a problem at all(we are 220mi). We follow the Portuguese tradicion that is the opposite of the Spanish. We have mother's and father's surname. We can opt to add or not the husband name, removing or not on of them in the marriage(I kept my single co.bination). All kids get the last surname of each parent usually (as my son)or more. My son is proud (here in Australia) of have both surnames. And thinking in practicality: I am divorced now, and it makes easy for each parent to have the surname in the child's name. And my son also has ar least one of the surnames of his half sister.