Guerin
A surname of French origin, often explained as coming from an old Germanic personal name meaning “warrior” or “marching in battle.”
The #5,525 most common surname in the United States (2010 Census) — about 1 in every 49,077 Americans shares it.
Etymology
Guerin is generally traced to the medieval personal name Warin/Guarin, ultimately from a Germanic root related to war and guarding. In older French forms, the name appears as Guerin or Guérin, and the underlying sense is often taken to be something like “protector” or “warrior.” The surname is therefore usually patronymic: it began as a family name meaning “son of Guérin” or “descendant of someone bearing that name.”
History
The name is well established in medieval France and appears in early French literary and historical sources. It also entered England after the Norman Conquest, where it is found among early recorded Norman names and tenants-in-chief. In Irish records, Guerin can also reflect an anglicized form of related Gaelic surnames, so the same spelling may have more than one origin in the British Isles.
Origin
Regions
Variant spellings
Fun fact
The same old name-family that produced Guerin also lies behind the English surname Waring.
From the historical record
“WAR IN l (A.-Fr.-Teut.) the French Warin, WARING J Guarin, Guerin, Gerin ('Chanson de Roland'), O.Teut.iri2>-m(o, Werin(o, found very commonly as a single name and also freq. in compound names like Warinbald, Warinbert, Warinfrid, Werinbald, Werin- hard, &c. Warino, Werin, Werina (f.),”
— Surnames of the United Kingdom: a concise etymological dictionary (2 vols in 1)