Somdet Phra (สมเด็จพระ) is her queenly rank; Sri (ศรี), pronounced and often transcribed Si, is an honorific. Her given name Suriyothai (สุริโยทัย) means Dawn. It is a compound of Suriya, from Sanskrit surya SUN; plus Uthai from udaya RISING, a cognate of Aurora and Ushas.
As was the custom at the time, King Maha Chakkraphat led his troops in the defense of the city from atop his war elephant. Even though women were not permitted to take part in battle, Queen Suriyothai was so concerned for her husband that she disguised herself as a man and rode into battle on her own elephant.
In 2001, a Thai movie about her life, The Legend of Suriyothai, was released. The film was directed by M.C. Chatrichalerm Yukol of the Thai Royal Family and financed by Queen Sirikit.