This appendix of Ilocano surnames is meant to complement the contents of Category:Ilocano surnames. This will focus generally on surnames in Ilocano-speaking regions.
For the purposes of this page, the regions used to determine which surnames will be included here are Ilocos Norte, Ilocos Sur, La Union, Abra, Apayao, Cagayan, Isabela, Nueva Vizcaya and Quirino.
For information about surnames in the Philippines, see Appendix:Filipino surnames.
Note: While surnames are not generally written with diacritics (excluding the tilde in Ñ), surnames from Spanish or in Spanish orthography are marked with accents according to Spanish spelling rules for etymological and pronunciation purposes. Others may be marked with diacritics following Tagalog rules.
Many surnames by Filipinos come from the Catálogo alfabético de apellidos by Governor-General Narciso Clavería in 1849, whose majority of it are Spanish surnames, but also includes may surnames from Basque, Catalan, Galician, Chinese, Philippine languages (Tagalog, Kapampangan, Cebuano) and some foreign languages. The degree of implementation of the Catálogo alfabético de apellidos varied by province, but it was strictly implemented across much of Ilocos Sur, resulting in many cities and towns having surnames of most locals beginning with the same letter (e.g. A in Vigan, G in Candon plus Banayoyo). Ilocano-language surnames which are in the Catálogo can be found at Category:Ilocano surnames in the Catálogo alfabético de apellidos.
In addition to names from Spanish and other Iberian languages, there are also many indigenous Ilocano surnames. Most of these surnames are concentrated in the Ilocano homeland. Only a few of them already existed before the Catálogo.
Listed here are some Ilocano surnames which originate in the Ilocano language. Provided after each surname is their region of origin. Some of these surnames are more common outside of the Ilocos provinces due to historical migrations.
Below is a list of the 50 most common surnames in each of the Ilocano-majority provinces. Independent cities within the Ilocano area are also treated as province-level divisions. From west to east (Ilocos region, Cordillera, Cagayan Valley), from most to least populous province.
Rankings listed are from regional individual surname data by Forebears, a genealogical and personal name database.
By province and province-level division:
Gaddang, Pangasinan or Tagalog surnames are explicitly marked.
Ibanag surnames are explicitly marked.
Ibanag surnames are explicitly marked.
Ifugao surnames are explicitly marked.
Gaddang and Ibanag surnames are explicitly marked.