It won't accept Daeneromy avy brōzan. Is it to reinforce the instrumental's place in syntax?
I think your version should be valid. Elsewhere in the lesson, the sentence "I am naming my son Aerys" accepts either Aeromy ñuhe trēsi brōzan or Ñuhe trēsi Aeromy brōzan.
That’s what I thought too, especially after seeing the second one you quoted in your comment.
In any event, thank you again.