For anyone who is interested: this type of name is called a patronymic, and besides Tamil Nadu exists in at least Iceland and Russia. In both of those countrie

For anyone who is interested: this type of name is called a patronymic, and besides Tamil Nadu exists in at least Iceland and Russia. In both of those countries, a particular grammatical ending is added to the name, whereas in Tamil culture the bare name is used. In Russia, people also have family surnames, in addition to patronymics. For example: “Dmitry Anatolyevich Medvedev”, whose father was presumably named “Anatoliy [something] Medvedev”. Or: “Katrín Jakobsdóttir”, whose father was presumably named “Jakob [something]”.