In which Asian country do people have the most Spanish origin names?

The Philippines is the Asian country where people have the most Spanish origin names due to the country's historical connection with Spain. The Philippines was a Spanish colony for more than three centuries, from 1565 to 1898. During this period, the Spanish influence permeated various aspects of Filipino culture, including language, religion, and naming conventions.

After the Spanish colonization, many Filipinos adopted Spanish names, reflecting this influence. A large number of Filipinos have surnames derived from Spanish, as they were either given these names by Spanish authorities or chose them for various reasons, such as to align with the colonial powers or for greater recognition in society.

In contrast, other countries in the options, such as Indonesia, Thailand, and Japan, do not have a significant historical connection to Spanish colonial rule, resulting in fewer Spanish-origin names among their populations. Thus, while these other nations may have their diverse influences, the prominent Spanish naming heritage is most notably seen in the Philippines.