Maharani Karthika Thirunal Lakshmi Bayi (1916-2008) was the only sister of the last ruling Maharajah of Travancore, Sree Chithira Thirunal Balarama Varma and of his successor, Sree Uthradom Thirunal Marthanda Varma. Under the matrilineal Marumakkathayam system of inheritance prevalent in the kingdom of Travancore, it was her children who were heirs to the throne. She therefore held a very special place in the Travancore court, superior to the Maharaja's wives, and was termed the Rani of Attingal in her own right. In 2013, her only surviving son duly succeeded his uncles as titular Maharaja of Travancore and is known as Moolam Thirunal Rama Varma.

Sree Padmanabhadasa Sree Chithira Thirunal Balarama Varma, popularly known as Sree Chithira Thirunal, was the last ruling Maharaja of the Indian princely state of Travancore, in southern India until 1949 and later the Titular Maharajah of Travancore until 1991. His reign is known for several notable reforms that have indelible impact on the society and culture of Kerala.