Thirunal is a surname. Notable people with the surname include:
Bharani Thirunal Lakshmi Bayi CI (1848–1901), the Senior Rani of Travancore from 1857 until her death in 1901 Ayilyam Thirunal (1832–1880), the ruler of the princely state of Travancore in India from 1860 to 1880 Moolam Thirunal, the ruling Maharajah of the Indian state of Travancore between 1885 and 1924 Uthradom Thirunal (1814–1860), the Maharajah of Travancore state in southern India Uthram Thirunal (1814–1860), the Maharajah of Travancore state in southern India Visakham Thirunal (1837–1885), the Maharaja of Travancore from 1880 to 1885 Anizham Thirunal Marthanda Varma (1706–1758), king of Travancore from 1729 until his death in 1758 Aswathi Thirunal Rama Varma, South Indian classical musician, a performing vocalist, veena player and writer Chithira Thirunal Balarama Varma (1912–1991), the last ruling maharaja of Travancore, in southern India Swathi Thirunal Rama Varma (1813–1846), the Maharaja of Travancore in India Uthradom Thirunal Marthanda Varma (born 1922), the current titular Maharaja of Travancore
See also Sree Chitra Thirunal College of Engineering, state-government engineering college in Thiruvananthapuram, Kerala, India Swathi Thirunal College of Music, music college in Thiruvananthapuram, Kerala, India Sree Chitra Thirunal Institute of Medical Sciences and Technology (SCTIMST), Thiruvananthapuram (Trivandrum), India established in 1974 Kodiyettru Thirunal, the festival celebrated in Swamithoppepathi for eleven days by the followers of the Ayyavazhi Swathi Thirunal (film) Special Jury Award - Lenin Rajendran Best Play Back Singer - M. Balamuralikrishna Best Art Director Uzhavar thirunal or Thai Pongal, thanksgiving festival at the end harvest season Thirunallar Thirunallur