Amerson
A surname that likely began as a patronymic meaning “son of Amery/Emery.”
The #6,263 most common surname in the United States (2010 Census) — about 1 in every 56,599 Americans shares it.
Etymology
Bardsley treats Amerson as one of several forms built from the personal name Amery, itself a medieval English form related to Emery. That name ultimately goes back to Germanic elements seen in names such as Almeric and Almaric, and in some cases was used for either sex. So the surname most likely meant “son of Amery” or “descendant of Emery.”
History
The name appears as a relatively rare English surname and is best understood as one of several medieval surname variants clustered around Amery/Emery. The surviving evidence in the cited source is limited and incidental, so the family-name history is mainly reconstructed from the broader name group rather than from many direct records. In later usage it persisted as an uncommon surname in English-speaking countries, including the United States.
Origin
Regions
Variant spellings
Fun fact
Bardsley notes that the same name-family eventually appeared in the Italian form Amerigo.
From the historical record
“Amery, Amary, Amory, Amerson. — Bapt. Uhe son of Amery * or ' Emery/ q.v. ; common to both sexes. Other variants were Americ, Almeric, and Almaric. It was decidedly popular. In the Italian dress of Amerigo it gave”
— A Dictionary of English and Welsh Surnames (alternate scan)