AlanGreen2 This is going to sound terrible and racist but hear me out....
I've had luck with using very difficult to to spell Hispanic surnames. I can speak Mexican Spanish so I can pull off the correct accent when pronouncing the names (i.e. a LL becomes a Y, a V is pronounced with a B instead, etc.)
The racism and disdain that some Indian scammers have towards the large US Hispanic population is insane, and they will give up trying to spell the names correctly, and they'll skip trying to enter the name in correctly into ViciDial and move on to the script.
The best surnames they can never spell right are near the end of the alphabet:
All very common names if you live in the US Southwest... but they grate on an Indian scammers ears. They can't spell Mississippi correctly so getting this part of USA culture right they won't even bother with.