Kuthen/KOTIAN of the Cumens.I have edited the article on Philppa of Hainault.Her maternal ancestry has been traced in an unbroken line to Elizabeth of Bosnia who was the daughter of Kuthen,Khan of the Cumens by a woman listed in all records Galicie of  to have been the daughter of Rurikide "Mstislaw" Jaroslwitsch, Prince de Halicz.ISs this possible?