Memorial of Queen Suriyothai, Ayutthaya Province, Thailand.
Battle Elephant Queen could be based off Somdet Phra Sri Suriyothai (Thai: สมเด็จพระศรีสุริโยทัย). She was a royal consort during the 16th century Ayutthaya period of Siam (now Thailand). She is famous for having given up her life in the defense of her husband, King Maha Chakkraphat in a battle during the Burmese-Siamese War of 1548.
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 सूर्य "sun"; plus Uthai from udaya उदय "rising", a cognate of Aurora and Ushas.