Rea
A surname of several possible origins, most often linked to a place-name or a Celtic word for a river or stream.
The #2,443 most common surname in the United States (2010 Census) — about 1 in every 20,834 Americans shares it.
Etymology
This surname is usually treated as a short form connected with other names such as Ray and Rae, and in some cases as a local surname from a place-name. Some writers also connect it with Celtic words for a river or stream, which fits old explanations tying it to dwelling near the River Rea. Because the historical record points to more than one pathway, the name is best treated as having mixed or uncertain origins rather than a single fixed source.
History
Lower explicitly cross-references Rea to Ray and Rae, while Harrison treats it as a Celtic surname and gives a river-based explanation. In English and Irish records, Rea has often been grouped with similarly spelled names rather than kept as a sharply separate surname. The name appears in multiple British and Irish contexts, which helps explain why its origin is not uniform.
Origin
Regions
Variant spellings
Fun fact
A 19th-century source notes that Scottish Reach can be pronounced with hard ch, showing how easily surnames in this sound-group were misread or mispronounced in mixed company.
From the historical record
“RAYNHAM. Rainham, a parish in Kent. REA. See Ray, and Rae. REACH. In the South, means a creek, and sometimes a part of a river more than usually straight. A Scottish family-name of the same orthography is jironounced as a dissyllable, with the ch hard, He-ach, and is referred to a Celtic origin. A gentleman dining…”
— Patronymica Britannica: a dictionary of the family names of the United Kingdom