Explainer: Why are many Hispanic surnames formed from 2 names and how does that work in the US?

FILE - A person holds an American flag and a Mexico flag at a news conference, in Chicago, Sept. 4, 2025. (AP Photo/Nam Y. Huh, File)

NASHVILLE, Tenn. (AP) — What's in a surname? For many people from Spain and Latin America, it's about who your father is and who your mother is.

The tradition of using two surnames helps clearly identify familial relationships in much of the Spanish-speaking world. But in the United States, having two surnames can be a bureaucratic headache, or worse.

The Associated Press