Henadic Theologian
Legend
Probably the Red dragon Hero/God Tchazzar in Chessenthia, in the Old Empire region: nothing about Egyptian or Sunerian stuff there, interessucceeded.
Tchazzar lived as an apparent Human for a long time to make himself a sort of Alexander the Great or Julius Ceasar legend and achieve godhood...and succeded.
Thay is the ominous red Wizards tower across the water from the volcano dragon...so, yeah, Red Wizards.
I wouldn't read too much into that, this not meant to be a detailed useful map, more just an artistic representation. We know Mulhorand and Unther are still there.