Family name origins & meanings
- Spanish and Galician (Castaño) : from castaño ‘chestnut (tree)’ (Latin castanea), hence a topographic name for someone who lived by such a tree or a habitational name from any of numerous places named with this word.
- Southern Italian : from medieval Greek kastanon ‘chestnut’, hence a topographic name for someone who lived by a conspicuous chestnut tree, or a nickname for someone with chestnut-colored hair.