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", and more recently by Philippine scholars such as William Henry Scott, this "Will of Pansomun" is still popularly used as a reference for tracing the genealogies of the Rajahs and Lakans who ruled the pre-colonial polities of Maynila and Tondo in the 1570s. It is sometimes mistakenly dated "25 March 1589" instead of "1539" but this does not reflect the date originally cited by de Los Reyes, 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." Disputed Provenance Genuineness questioned by Isabelo de Los Reyes The document referred to as the "Will of Pansomun" first became known through the work of Isabelo de Los Reyes, in Volume 2 of his seminal work in Philippine folkloristics, "El Folklore Filipino." This second volume, published in 1890, included the work in a category titled "Folkloristic miscellany", and, along with the 1563 will of Andres Mangaya, who claimed to be Malang Balagtas' descendant and who had attached the original "Will of Pansomun" to his own will. De los Reyes immediately questioned the provenance of these two "very curious unpublished documents about the Rulers of the Philippines and Moluccas at the time of the Conquest," noting that they had: "certain facts which contradict those which are accepted as historic truths" Exposition on inconsistencies by William Henry Scott Commenting on the will in his 1982 book "Cracks in the Parchment Curtain," William Henry Scott notes that two "anachronistic" dates in the documents immediately bing its genuineness to question: the "25 March 1539" date of the document itself, and the "early part of 1524" reference in the text when Malang Balagtas and his family were supposedly baptized by a bishop in Cebu. Both of these dates are impossible, since, as Scott points out: "the only Spaniards in the Philippines in 1524