I realize Beatrice is still alive in 1066, but the way the game engine works Mathilda can't inheirit. She was the real force of Tuscany and the instigator of the Guelph/Ghibelline feud (a woefully underrepresented facet of history). Why not make Mathilda Duchess of Tuscany and Spoleto and have Beatrice as a courtier? The same thing is done with Magnus Billung over in Saxony.