Inspired by my other thread dealing with the house of Bruce being more successful, I was looking at John de Balliol and Robert de Bruce's lines, and noticing similarities in dates (Edward de Balliol's initial betrothed, Isabelle de Valois and Marjorie Bruce were roundabouts the same age; David II and Edward de Balliol's second betrothed (Margherita of Taranto) - same thing). And it got me wondering if there was a way that we could wind up with a Scots' monarch descended from both, so since my knowledge of pre-Stewart Scots' history is spotty, I thought I'd make it a AHC.
1. You can achieve this hypothetical monarch after the Stewarts have already inherited the crown of Scotland (after all, the Stewarts descend from Robert I through his daughter).
2. The monarch can be descended from both kings in the female line, but bastard lines are out (otherwise it would make it too easy).
3. I'll edit the list of rules if anything more comes to me.
Have fun