Gary Halbert lives (?)...
 

the Complete History Of Garth's On the Web
 

yes this does look like a GH clone but I think there have been many to try the same thing since GH did it

but it got me thinking about niches based on this.

You think there could be interest say doing research on the internet on all the people on the net with your same first name.

Then pick say the ten most interesting and package that in a report to all the people with the same first name. The niche might be this is only for people found on the net.

It might include demographics like height and weight thus one Garth could compare their height and weight to the average Garth for example.

All the Garth's academic history.
The average Garth may only have a high school diploma with a GPA of 2.0
The average Garth has been married two times, blah, blah

That's just on demographics so you could extend this into other areas beyond demographics of course so there could all kinds of products that could be developed to present the state of art research on Garth's.