Possible interpretations of the origin:
* From a place: It could be a toponym, meaning it refers to a place where the first bearer of the name lived.
* From a characteristic: It's possible it relates to a physical characteristic of the first bearer, like a "jaramillo" being a type of shrub in some regions.
* From a trade: It could have originated from a trade or occupation, like a "jaramillo" being a type of artisan.
Without further context, "Jaramillo" simply means "Jaramillo" in English. It's used as a last name and doesn't have a broader meaning.