Aguinaga
A Basque surname likely referring to a place-name or local feature, with the first element probably tied to a plant term and the second to a place suffix.
The #6,961 most common surname in the United States (2010 Census) — about 1 in every 64,082 Americans shares it.
Etymology
Aguinaga is generally treated as a Basque surname built from a local place-name. The ending -aga is a common Basque locative element meaning roughly 'place of' or 'place with,' while the first element is usually linked to a plant-name or terrain term, though the exact root is not fully secure from the excerpted evidence. In practice, the name is best understood as 'the place associated with Aguin-.'
History
The surname is associated with the Basque-speaking region of northern Spain and neighboring areas. Like many Basque surnames, it likely began as a house or locality name before becoming hereditary. The excerpted source simply lists it among Spanish surnames, which supports its presence in Iberian onomastic tradition but does not give a full derivation.
Origin
Regions
Variant spellings
Fun fact
Basque surnames often preserve old house or farm names, so a surname like Aguinaga can point back to a very specific local place rather than a trade or nickname.
From the historical record
“ña, Acosta, Adamuz, Adaro, Ael, Agrela, Agroma- yor, Aguas, Aguayo, Agudo, Agüero, Águila, Aguilue, Aguiló , Aguinaga, Aguirre , Agulbj, Ahumada, Aillon, Alaminos, Alanis, Alarcon, Alas, Álava, Alba, x\lbacete, Albarado, Albarracin, Al- bear, Albeniz, Alberola, Albiñana, Albistur, Al- bolafia, Albuerne, Alcacer…”
— Ensayo histórico etimológico filológico sobre los apellidos castellanos