alfabético de apellidos ("Alphabetical Catalogue of Surnames") listing Hispanicized Chinese and Filipino words, names, and numbers. Surnames of Spanish nobility and several colonial administrators, which include the preposition de as a nobiliary particle, were explicitly prohibited. Many names which resulted are not common to the Hispanophone world, because they were Hispanicized from the original Filipino or Chinese. This new naming system also did away with the Filipino custom of siblings taking different surnames. People Filipinos belong to the Austronesian ethnic group of the Southeast Asian region. The natives of the Philippine Islands may be related to the Chamorro people in the Mariana Islands (named Islas de Ladrones during Ferdinand Magellan's expedition) of the Pacific Ocean due to their racial similarity, and for being geographically not connected to the Southeast Asian mainland as a group of islands, but are rather different from the Pacific Islanders belonging to the Polynesian, Micronesian, and Melanesian ethnic groups. The natives of the Philippines are rather closely related to their closest neighbors, which are Malaysia and Indonesia. Most of the immigrant ethnicities of the Philippine Islands are from the Southeast Asian region. Although there are many ethnic groups in the Philippines, such as the native population (Tagalog, Bisaya, Bicolano, Ilocano, Mindanaoans, and the native Moros in Mindanao), that some people of the Philippines of this present time, consider them to be related to the Aborigines of Australia and Melanesians, are rather the result of the long period of interracial mixture among the native ethnic groups of the Islands. The Philippine Islands is still politically divided among the ethnic groups and regional groups, but there are also Chinese, Japanese, and Indian peoples who migrated after the Spanish colonial era and created their own non-native ethnic group. There are still a few Filipinos and prominent Filipino families today who are of pure Spanish ancestry. Nevertheless, Stanford University had stated that only 1–3% of the Philippine population had minimal degrees of Spanish blood. The official percentage of Filipinos with Spanish ancestry is unknown. However, in a research done by Dr. Michael Purugganan, NYU Dean of Science in 2013, he conclude that Filipinos today are the conclusion of an Austronesian and Chinese migration result from thousands of years, a melting pot of Asia in pre-colonial era. He stated that; "We are all of many Indo-China mixes, and I think every Filipino who is genetically tested will show up as a