I don't think I'd have a problem honestly.
It so happens that my mum unknownly used her best friends girls name as my name and when they met back up after 3 years (remember no facebook or mobile phones lol) it was a suprise and it was the same unique spelling.
But we grew up together and it's never made a void between anyone and we are pretty much like sisters and we nicknamed ourself jelly and jay.
If my son's name was used by someone not out of spite but by accident I'd not care really. If it was out if spite then I'd be more then willing to ignore them even if they were family.
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