If you read the letters you get sent at lvl 15/30/45/58, they tell you right where the NPC is.
15: Adso's Camp
30: Ost Guruth
45: Spire of Meeting
58: Orc Watch
The list of Class Deeds are;
- A Building Rage -- Use Thrash - Tier 3
- A Thousand Stingers -- Use Bee Swarm
- Bear in Mind and Hear -- Enter Bear Form
- Beorn's Gift -- Enter Bear Form
- Beorn's Might -- Use Thickened Hide, Call to Wild or Nature's Bond
- Full Force -- Slam your foes
- Get your Bearings -- Enter Bear From
- Hearten! -- Use Hearten
- Hearth and Home -- Bake Honey-Cakes
- Impervious -- Parry/Evade Enemy Attacks
- Master the Basics -- Use Slash
- Natural Beorn Leadership -- Use Hearten
- Not the Bees! -- Use Bee Swarm
- Overbearing Presence -- Use Feral Presence
- Overwhelming Strength -- Use Relentless Maul
- Quick Slash -- Use Slash
- Rattling Roar -- Loose Ferocious Roar
- Stand Firm -- Use Bracing Roar
- To Battle! -- Use Rush
- Unexpectedly Agile -- Parry/Evade Enemy Attacks
- Weight on their Shoulders -- Use Slam
The remaining 3 places are taken by the lvl 15, 30 and 58 Class quests.