Petronila was born on February 22nd 1934. in Kawite, Cavite to Benito Olaes and Fidela Galan.
Petronila is known as "Nila."
Nila's brothers were Emilio Galan Olaes, Cornelio Galan Olaes, Victor Galan Olaes, Nemecio Galan Olaes, Constantino Galan Olaes, and Leopoldo Galan Olaes. Her sister was Soledad (Galan) Olaes Basa. Nila had two half-brothers from her father's side, Higino Olaes and Anastacio Olaes and a half-sister from her mother's side, Beatrice (Galan) Lontoc Balan.
Nila married Alfonso Deleon on December 15th 1961. Their son was Paul Olaes Deleon and daughters were Bernadette Olaes Deleon and Eleanor Olaes Deleon.