Mena (surname)
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Found in the valley of Mena (Alava, which today is Burgos), with branches in Bilbao and in Dima (Biscay) and it appears to have also moved from there into Navarre; regions now part of Spain. It appears to mean mineral or a vein of mineral deposits. However, at least one author, Lopez Mendizabal, holds that its meaning is pastoral. A variant of the surname is Menaca, with the '-ka' suffix representing "place of", as in "place of Mena", equivalent to the Spanish "de Mena".[2]