Original sentence: A nair matriarchal family is called as a Tarawad or Marumakkathayam family.A traditional nair Tarwad consists of a mother and her children living together with their mother's surviving eldest brother or eldest surviving maternal uncle who is called as Karanavan.The traditional nair community in Kerala, South India is matriarchal by system
Edited sentence: A Nair matrilineal family is called as a Tarawad or Marumakkathayam family.A traditional Nair Tarwad consists of a mother and her children living together with their mother's surviving eldest brother or eldest surviving maternal uncle who is called as Karanavan.The traditional Nair community in Kerala, South India is matrilineal by system