If I remember correctly Patel and Singh are like smith and jones in English speaking countries. Patel is from farming, business, government families and Singh was from part of the warrior caste but lots of families from multiple castes adopted it so it’s now a common last name. Where I work we have a lot folks with last name of Patel.
As for Patel, people with that surname as commonly motel owners in the U.S. has been widely noted (e.g., “America’s Patel motels,” http://news.bbc.co.uk/2/hi/south_asia/3177054.stm.
And V.J. Singh is a terrific golfer. Older now, still playing, but not in the PGA.