You had me at Muslim pirate queen, autumnleaf. I'd think agents--and publishers--would be foaming at the mouth for that. Good luck! Also, 41 years isn't too off the mark. If someone were to complain about this, in my opinion, that's super nitpicky. Others might disagree, but I, as a reader, wouldn't get that upset by the mention. Just maybe include it in your afterward that she wasn't around in the given years of your story. Again, this is just me.
I have a quick question. I see a lot of agents say that they're seeking "sweeping historicals" and I'm unsure of what that means. Is it just a common phrase used to describe historical fiction? Or is there a difference between a regular old historical fiction book and a sweeping historical book?