A Spanish surname meaning 'rosemary' or 'rosemary picker,' also used as a given name in Spanish-speaking cultures.
From Spanish 'romero,' derived from Latin 'rosmarinus,' combining 'ros' (dew) and 'marinus' (of the sea), referring to the herb that grew along Mediterranean coasts.
Rosemary actually means 'dew of the sea' in Latin, and the name Romero carries that poetic origin—many Spanish surnames are based on herbs, animals, or places rather than just family histories.
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