What is "mazagaon"

Mazagaon, also spelled Mazgaon and Mazagon (Portuguese rule Mazagão), and pronounced by the Catholics as 'Mazgon' or 'Maz-a-gon' and the Marathi-speakers as Mazhgav. It is one of the seven islands of Mumbai. It is part of South Mumbai and can be reached by Byculla Station on the Central railway line and Dockyard Road Station on the Harbour Railway line. Located in Mazagaon are maritime companies like the Bombay Port Trust and Mazagaon Dock Ltd., the Mazagaon Court and Anglo-Indian schools including Rosary High School, St. Peters School, Antonio D'Souza High School and St. Mary's School.