To
A short surname that can have different origins depending on the family, especially in East and Southeast Asian naming traditions.
The #3,979 most common surname in the United States (2010 Census) — about 1 in every 34,558 Americans shares it.
Etymology
Because this surname is so brief, it does not point to one single origin. In many cases it is an East or Southeast Asian surname or romanization that reflects a syllable or name element from a larger source language rather than an English word-name. In English-speaking records, it can also appear as a shortened or altered form of another surname, so the same spelling may hide several unrelated origins.
History
The spelling To is found most often in modern diaspora records, where romanization practices can flatten different original surnames into the same English form. In Chinese contexts it may represent more than one underlying surname depending on dialect and romanization system, while in Vietnamese and other Southeast Asian contexts it can reflect a separate native form. As a result, family history and original script are usually needed to determine the exact derivation.
Origin
Regions
Variant spellings
Fun fact
Very short surnames like To are often ambiguous in genealogy because identical English spellings can map to several different surnames in the original language.