Two Russian Princesses during middle middle ages (12 century) Alternative history

Miroslava (Efrosinya - christian name) Vladimirovna was princess of small city of.... I don't know.... Rzhev, on the border of Great Novgorod - huge merchant-aristocratic half republic half monarchy. She was only child of shortly reigned prince (Knyaz), and never was similar to other noble girls of her age. More than standing in church and praying or being wed to some son of prince she preferred to eat with greek and russian books, mostly about history. She was more Druzhina princess, of her father's guard... At the next day after her father died "Miroslava the fat" or "Miroslava the stern" made bishop to arrange wedding of her and Ekaterina - daughter of merchant. It caused huge shock. Besides, in Ancient rus there was precendent of heritage "Eldest in kin is heir", so many other pretendents arised.....