Soren: I-am-a-leader
Twilight: BattleIsAmazing
Digger: Smarty
Otulissa: Brainz
Gylfie: FeatherBall
Barran: IAMAQUEEN
Cleve: KnowledgeIsBest
Ezylryb: ThreeTalons
Dustytuft: CallMePhillip
Nyra: ToughMama
Coryn: CallMeCoryn
Kludd: YOUARENOTAPUREONE
Primrose: Lonely
Eglantine: GoldenFeathers
Skench: Superior
Bubo: BonkSmith
Thora: ThoraSmithOfSilverveil
Stryker: StrykerStrikesAgain
Uglamore: Uglaaamor

Now the owls from the prequels:

Grank: The First Collier
Theo: BattleClawedWarrior
Hoole: KingOfGa'hoole
Phinaes: I'm_Hoole's_Bff
Ygryrk: HagsfiendAwesomeness
Pleek: sleekfeathers
Kreeth: Master of Science
Lutta: Shapeshifter
Wyg: Theo's_Stepfather

Phew, that was a lot. I missed probably a ton but I'll add them later. If you have any characters you'd like to be added, please comment below and they'll star in the next chapter.