I don't know if this has been mentioned before, but while looking for something completely unrelated, I came across the year 1067 DR - Year of the Paladin Minotaur. I thought that was interesting. At least now I have a date for when my 'minotaur hero' saved the city of San Taur.
"I have never in my life learned anything from any man who agreed with me" --- Dudley Field Malone
I like many of the ideas from this, and will likely add it in my own world.
I really liked the addition of Hathor to this entire thing. She could have seen these long suffering Minotaurs and been inclined to aid them...not sure how the coming of the Mulhorandi pantheon would tie in though. Especially since in my own Realms there is no Mulhorandi pantheon (I only use Set as the god revered in Mulhorand, which in my world is more like Stygia of Hyboria).
For GENERAL use however, I think an elder Beast God (now gone) could have originally been the patron of the Minotaurs. Once they had their own Demi-God they were able to continue on their own.
That particular Demi-God might even still live on WITH the Minotaurs. Many Demi-Gods live on the Prime Material Plane...and so, without its followers even realizing it, the Demi-God might live among them...and also be the reason that their city is so well hidden. His direct intervention (by use of his magical power) could keep the city hidden from most.
It's not a direction I would have chosen, but ShadowJack had opted to involve gnomes in the minotaur community, and it was in part due to gnomish illusions that the city remained hidden. That's back on the 3rd page of the discussion.