The alleged "Will of Fernando Malang Balagtas", sometimes also referred to as the "Will of Pansomun" is a disputed early Spanish-era Philippine document which was supposedly issued "on 25 March 1539" by a "Don Fernando Malang Balagtas", whose original name (before his baptism as a Catholic) was "Pansomun." Despite its provenance having been questioned by Isabelo de Los Reyes when he first published a copy of the will in the first volume of his seminal compilation "El Folklore Filipino",[1] and more recently by Philippine scholars such as William Henry Scott,[2] this "Will of Pansomun" is still popularly used as a reference for tracing the genealogies of the kings and lakans who ruled Manila and Tondo until the fall of these dominions to Spanish rule in the 1570s.[3]
It is sometimes mistakenly dated "25 March 1589" instead of "1539"[3] but this does not reflect the date originally cited by de Los Reyes,[1] and is inconsistent with the document's use as an attachment to yet another will - that of Andres Mangaya, who claimed to be Malang Balagtas' descendant when he executed his own will on "Oct 3 1563."[2]