According to an 1818 study by the renowned German ethnologist Fëdor Jagor, "The Former Philippines thru Foreign Eyes", about "1/3rd of the inhabitants of the island of Luzon were mixed with varying degrees of Spanish ancestry and that the vast majority of military personnel have Latin-American origins."[REF] .
Using data based on Fëdor Jagor's study, it is estimated that Filipinos with at least some Spanish or Hispanic ancestry comprise roughly +/-33.33% of the current Philippine population.