Constantino was born .... in Kawite, Cavite to Benito Olaes and Fidela Galan.
Constantino was known as "Tino."
Tino's brothers were Emilio Galan Olaes, Victor Galan Olaes, Cornelio Galan Olaes, Nemecio Galan Olaes, and Leopoldo Galan Olaes. His sisters were Soledad (Galan) Olaes Basa and Petronila (Galan) Olaes Deleon. Tino had two half-brothers from his father's side, Higino Olaes and Anastacio Olaes and a half-sister from his mother's side, Beatrice (Galan) Lontoc Balan.