corso
Her last name is Wadekar. You can find it on Wikipedia.
Michael "Mike" O'Donnell (you can find it on wiki)
It is unclear who the first person with the last name Rosario was as last names can have various origins and may not always have clear documentation. The name Rosario is a common surname in Spanish-speaking countries, and it likely has a long history with multiple people bearing the name throughout the years.
Rosario Alair's birth name is Rosario Maiolino.
her full name is rubye peyser
Ilza Rosario's birth name is Ilza Rosario Ponko.
Marcio Rosario's birth name is Marcio Roberto Winterman Rosario.
Rosario Bourdon's birth name is Joseph Charles Rosario Bourdon.
Andrew Del Rosario's birth name is Andronico Del Rosario.
Rosario Huerta's birth name is Maria del Rosario Huerta Gonzalez.
Cecile del Rosario's birth name is Cecile Rae del Rosario.
Rosario Prieto's birth name is Rosario de los Milagros Prieto Prez.