Seems chosen and heir are somewhat the same....
Aglaecwif about the strongest power : (Jake is called a potential inheritor)
You "Order? What is that?"
Female "The power to command all things. To structure all things. To write the laws that govern the universe and to have both the Power and the Authority to enforce them."
Female "I've never personally met a being, human or monster that has acquired it since the origin, although..."
Female "I did, not long ago, hear talk of a potential inheritor, one your Ella had high hopes for. Though it seems to have ended in a failure. A weak mind can ruin even the greatest potential."
Female "Still, if it were possible to completely inherit the traits of both the First and the Second, to claim one of the original powers... A spawn that could fully realize that strength would be unfathomably powerful."
Female "Of course inheriting both traits from any of the twin Apostles would make a spawn quite exceptional."
The eye when you select "power" : (Jake is called chosen here)
Unknown "The son and granddaughter of Oil. The crossed assassin. The failed chosen of Authority.
Alice's Grandpa during her evolution : (heir again..)
Unknown "Awaken, Descendent of the Sixth, Granddaughter of the Ether, heir to Space."
Who are the son and granddaughter of Oil??? Dexter and Tiffany??
Is the fairy an Apostle : "Space"? or is the Ether one of the Apostles descending from Space?
Unknown "Usher in our return..." That seems to imply it's another origin....