𝗔𝗻𝘆𝗼𝗻𝗲 𝘄𝗵𝗼 𝗵𝗮𝘀 𝗮 𝗽𝗿𝗼𝗯𝗹𝗲𝗺 𝘄𝗶𝘁𝗵 𝗺𝘆 𝘀𝘂𝗿𝗻𝗮𝗺𝗲.
I want to tell them that surname is based on region, tribe and families, not religion. There is no such thing as a surname in any religion. It is only a by-product of the tribe's people.
Muhammad (Peace Be Upon Him) did not even have a surname. He were from the Hashim family of the Quraysh tribe. Shri Ram's surname was also not there. The surname is based on the Gharana, tribes & region. Anyone can change their surname at any time.
Sometimes the surname is based on their works and deeds. Patel means Bada or Rasuk Dar. The people of the village call Patel the growing people. My grandfather has earned a nickname. All my grandfather brothers have different surnames.