The primal Alexander was born of the Hotgo, a tribe massacred by the Dotharl, whom recently received a fair bit of attention in the MSQ. I wonder exactly when did the massacre happen and why?
The Dotharl raise a number of questions with their beliefs that seem rather close to descriptions of the Echo, and their relationship with the Hotgo that they slaughtered, creates more questions to be asked. This also may tie in with the House of Crooked Coin, which allegedly contains a essence of Nhaama, and figures into the Dotharl act of ending their cycle of rebirth.
Mide Hotgo and her lover Dayan, alongside her comrades summoned Alexander the first time about three years ago past Heavensward. Key to this story is the horn stuck in Seal Rock, the plot of which took place in 1.0, about seven to five years ago. It was retrieved by an Ascian agent and spirited away to where Mide lived as a child - presumably the Azim Steppes. This might place the massacre around the time of the Calamity, when Ascian activity was at a peak. Then again, with the Echo visions in 1.0, it is unclear when the Ascians acquired the horn.
The larger question is why did the Ascians give the horn to Mide? Did they know that the Dotharl were going to massacre her tribe, or did they have a personal hand in it? The Dotharl in-game are strangely hospitable, a far cry from a tribe that would massacre an entire tribe to the last woman and child. However, Cirina did note that the Dotharl of the past used to reign and they have lost power recently. Could this be tied to the massacre of the Hotgo?
Another point of interest is the Enigma Codex, supposedly completed in 1740, about 102 years since the start of 1.0. The Enigma Codex contained knowledge and information that could have made its owners powerful beyond their dreams, yet the knowledge inside was never used pre-Garlean Empire. More over, at the end of the Alexander series, it is said that Mide and Dayan were reborn in ancient times as founders of the Hotgo tribe. Does that mean the Codex existed even earlier in various forms before evolving into the Codex as seen in-game? If it existed among the Xaela tribes, why didn’t its owners use the Codex to uplift the Xaela?