According to the testimony of Dutch Admiral Cornelis Matelief de Jonge Raja Bongsu was one of four surviving sons of Raja Ali bin Abdul Jalil (alias Raja Omar) of Johor.
It is known from a collection of subfossil bones from the Mare aux Songes swamp, a detailed sketch made by de Jossigny in 1770, a no less detailed description by Desjardins of a bird shot in 1836, and a number of brief reports about owls, the first being those of Van Westzanen in 1602 and Matelief in 1606.
Cornelis Johannes van Houten | Cornelis Tromp | Cornelis de Bie | Cornelis Vreeswijk | Jacob Cornelis Matthieu Radermacher | Cornelis Matelief de Jonge | Cornelis Kruseman | Cornelis Johannes Kieviet | Cornelis de Bruijn | ''William Fitzwilliam, Second Lord Fitzwilliam of Liffer'', Cornelis Janssens van Ceulen | Twee Jonge Gezellen | Pieter Cornelis Dommersen | Pieter Cornelis Boutens | Johan Cornelis van der Wijck | Freek de Jonge | Cornelis Zitman | Cornelis van Tienhoven | Cornelis Schrevel | Cornelis Marinus Pleyte | Cornelis Lely | Cornelis Jol | Cornelis Johannes van Doorn | Cornelis Janssens van Ceulen | Cornelis Hulsman | Cornelis Elout | Cornelis Eliza Bertus Bremekamp | Cornelis Drebbel | Cornelis de Wael | Cornelis de Bondt | Cornelis Claesz van Wieringen |