Karthika Thirunal Lakshmi Bayi

The couple had four children, Elayarajah (Crown Prince) Avittom Thirunal Rama Varma (1938–1944, died at the age of six of a rheumatic heart condition), Pooyam Thirunal Gowri Parvati Bayi (1941), Aswathi Thirunal Gowri Lakshmi Bayi (1945) and Sree Moolam Thirunal Rama Varma (1949), the Titular Maharajah of Travancore and the Head of Travancore Royal Family & Supreme Guardian/Custodian of Sree Padmanabhaswami Temple. In the memory of his late nephew, Prince Avittom Thirunal, Maharajah Chithira Thirunal Balarama Varma built the SAT Hospital in Trivandrum.

The preparations for the Pallikettu (wedding of a Travancore Princess)began in 1933 itself. Huge wedding venue was created at Sundara Vilasom Palace. Many prominent Indian Royals were invited for the wedding and the wedding was a lavish affair. The wedding of 17-year-old Karthika Thirunal and 26-year-old Godavarma Raja took place on 24 January 1934. The royal couple stayed at Kovalam for their honeymoon and it was during this time, Godavarma Raja, smitten by the beauty of the place, decided to develop and promote Kovalam as a tourist destination. After their wedding, G. V. Raja joined the Travancore State Force (Army) and served as a Lt. Colonel and as one of the commanding officers of the Nair Brigade (Travancore King's Bodyguards).

When P.R. Ramavarma Raja, (husband of Karthika Thirunal's maternal aunt), visited Kowdiar Palace, he put forward the name of his younger brother Godavarma Raja (Col.G. V. Raja) as a prospective bridegroom for Karthika Thirunal. Godavarma Raja who later attained immortal fame as the King of Kerala Sports and Tourism, at the time of the proposal was studying in Madras for attaining a Degree in Medicine. The couple met each other in 1933. Godavarma accepted the wedding proposal for Karthika Thirunal's hand and discontinued his education there. Karthika Thirunal's family too approved, and the wedding was thus announced. It was the first time a Travancore Princess married some one other than a Koyi Thampuran. Poonjar Royal Family is believed to be the descendants of Pandya Dynasty.

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.

She was born as the only daughter of Sanskrit scholar and aristocrat Sri Pooram Nal Ravi Varma Kochu Kovil Tampuran of Kilimanoor Kovilakam and Amma Maharani Moolam Thirunal Sethu Parvathi Bayi of Travancore, on 17 September 1916, in the matrilineal Royal House of Travancore. She was educated by selected tutors and scholars. She mastered languages like Malayalam, Sanskrit, English, French etc. From her childhood itself, Karthika Thirunal was deeply interested in dance and music. Recognizing her interests, her elder brother, Maharajah Sree Chithira Thirunal, appointed Harikeshanelloor Muthaiyya Bhagavathar as her music teacher. In 1933, at the age of 16, Karthika Thirunal became the first from her family to undertake a sea voyage with her mother, against the then prevalent superstitious belief related to crossing the sea. She also participated in the All India Women's Conference of 1935, held in Trivandrum.