Thanadelthur "Thanadeltth'er" (c. 1697 – 5 February 1717) was a woman of the Chipewyan Dënesųłı̨ne nation who served as a guide and interpreter for the Hudson's Bay Company. She was instrumental in forging a peace agreement between the Dënesųłı̨ne (Chipewyan) and the Cree people. She was trilingual, able to speak English, Chipewyan, and Cree.