What is "sobalvarro"

Sobalvarro/Sobalbarro is a surname of Northern and central European descent. The first record of the name appears in the Basque regions of Spain. The name was purportedly constructed by combining the names of three brothers. The surname appears between the 11th and 14th centuries in the northern Spanish region of Roncesvalles. References to the family name appear with increasing frequency from the 15th to the 19th century, specially in regards to the negotiation with the French in the Treaty of Devolutionin 1662.