Arruazu
Arruazu is a surname of Basque origin. It is a toponymic surname, derived from a place name. In this case, it comes from a municipality in Navarre, Spain, also called Arruazu.
The name Arruazu itself likely derives from the Basque language, although the precise etymology is debated. Some scholars suggest it may be linked to the words "arri" (stone, rock) and a suffix, possibly indicating a stony or rocky place. Others propose different origins.
People with the surname Arruazu are found primarily in Spain, particularly in the Basque Country and Navarre. Due to Basque diaspora, it is also found to a lesser extent in other countries, particularly in Latin America.
The surname is relatively uncommon. As such, prominent figures bearing the name are not widely known outside of their specific fields or communities.
Genealogical research indicates variations in spelling have been minimal throughout history.