Alphabetical Catalog of Surnames

The Alphabetical Catalog of Surnames (Spanish: Catálogo alfabético de apellidos, Tagalog: Alpabetikong Katalogo ng mga Apelyido or Katitikang Talaan ng mga Pangalang angkan) is a book of surnames published in the Philippines and other islands of Spanish East Indies in the mid-19th century. This was in response to a Spanish colonial decree establishing the distribution of Spanish family names among the inhabitants of the Philippines who did not have a prior surname.

The book was created after Spanish Governor General Narciso Clavería y Zaldúa issued a decree on November 21, 1849. Following the Christianisation of the Philippines, many Filipinos chose surnames such as de los Santos, de la Cruz, del Rosario, and Bautista for their religious significance; even today these surnames are perhaps the most common. Many other Filipinos also chose surnames of well-known chieftains such as Lacandola. Furthermore, many people within the same family had different surnames. This created difficulties for the Spanish colonial authorities, who found that it hindered their ability to perform a census of the archipelago's inhabitants, as well as complicating the collection of taxes.