Hiatt
An English surname most likely from a place-name or a shortened form of a name built on Old English words for a “high” settlement or site.
The #3,486 most common surname in the United States (2010 Census) — about 1 in every 30,130 Americans shares it.
Etymology
Hiatt is usually treated as an English surname connected with place-name forms such as Hayatt or Hyett, which themselves are often explained from Old English elements meaning “high” and “dwelling” or “enclosure.” In other words, the name likely began as a reference to someone who came from, or lived near, a high place or elevated homestead. Because the historical spellings vary a lot, the surname may also overlap with related forms like Hyett and Hiett.
History
The excerpts place Hiatt among English surnames and explicitly point readers to related forms such as Hyett, suggesting close spelling and origin links rather than a wholly separate name. The surname is found in England and later in the United States, where it became established through migration and phonetic spelling variation. Modern bearers are especially common in English-speaking countries.
Origin
Regions
Variant spellings
Fun fact
In older surname lists, Hiatt is often grouped with several similar-looking names, showing how easily English regional spellings could drift over time.
From the historical record
“Also v. Heigham. London, 5 ; MDB. (co. GloucX 3. Hiatt; v. Hyett. Hibbard,Hibbart,Hibberd, Hibbert^ Hibbit, Hibbitt, Hibbett, Hibbits, Hibbitts, Hibberson.— (i) Bapt *the son”
— A Dictionary of English and Welsh Surnames (alternate scan)