Complex sentence: The first portion of the name of Rio de Janeiro/Galeão-Antonio Carlos Jobim International Airport is a reference to the beach closer to the airport, which in turn got is name from the galleon "Padre Eterno", which was built at this location.
Split into simpler sentences: The first portion of the name of Rio de Janeiro/Galeão-Antonio Carlos Jobim International Airport is a reference to a beach close to the airport. The beach in turn got its name from the galleon "Padre Eterno", which was built at this location.