When simon calunsag agan was born in 1901, in Negros Oriental, Philippines, his father, Candido Gumisad Agan, was 39 and his mother, Antonia Olandag Calunsag, was 29. He married Felipa Olpoc Siong in 1932, in Negros Oriental, Philippines. They were the parents of at least 2 sons and 3 daughters. He died on 29 June 1979, in Zamboanga City, Zamboanga del Sur, Philippines, at the age of 78.