Pretty cool site I found called www.publicprofiler.org. It gives you a ton of information about your last name for instance this is what I was able to find about Watts:
The root of Watts is European/Other Western, the root language for the name is English. The name is most popular in Australia followed by Great Britian, New Zealand, United States and Canada. It goes into further detail listing the top regions and Cities.
I also found out that the top Forenames (or first names) for Watts are Ian, Robt, Martin, Frank and Christine.
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