Well, strange is relative.
A huge part of the world wouldn't find this name strange.
Max is right about the Spanish names formation.
Guillermo Paz y Miño Cepeda, however, doesn't come from Spain but from Quito, Ecuador.
His family is quite famous there.
He is the brother of a historian and son of a books and newspapers editor.
Other family members are well know in social sciences fields.
His brother