I Gav,
May i turn the complicometer on?
Have you seen this?
http://www.oriental-arms.co.il/photos.php?id=4803
What does a name that sounds Spanish in an Indian sword ? in the minimum, bizarre

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Alright, it could be, or is indeed, a trade (Firangi) blade.
Dime, besides being the $ ten cent, would mean 'tell me' in Castillian. El Aterro would mean the 'landfill' (embankment). But we know that persons names are not necessarily translatable.
I wish you luck with this one

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