I bet that there is a very high chance that when you meet an Indian who wears a turban, the family name will be SINGH.
The surname “Singh” is more widespread than “Patel.” ( the other very popular Indian surname ).
Singh is a common surname among Sikhs and is also used by many Hindu communities, especially in North India. It is derived from the Sanskrit word “Simha,” meaning lion.
It says that in the native American communities.
That a white man was doing some teepee hopping

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.
Singh means lion. All Sikh men (and some non-Sikhs) are Singh. All Sikh women are Kaur, which means Princess.
An Indian bank teller with the lash name of Shah usually belongs to the Jain religion. Think of Hinduism on steroids.