I don't know if names are "claimed" or "reserved" in Sweden. But they seem to use the same names even among siblings. If you look at the current King's father & father's siblings:
Gustaf Adolf Oscar Frederik Edmund
Sigvard Oscar Frederik
Bertil Gustaf Oscar Carl Eugen
Carl Johan Arthur
one of Gustaf, Oscar, Carl appears in all their names.
Gustaf Adolf Oscar Frederik Edmund
Sigvard Oscar Frederik
Bertil Gustaf Oscar Carl Eugen
Carl Johan Arthur
one of Gustaf, Oscar, Carl appears in all their names.