For these achievement you need the "Sleep Darts" and the "Animal Taming" Skill in the Seer Skilltree. You should do this together with the "Set-up Date" achievement.
In the territory Sapi-Res Nome is a Camp called Pyrrhos nearby a fast travel tower. In this camp I found every time 2-3 lions in cages. Clear the camp from the enemies and equip and your sleeping darts on a lion in a cage. After the lion is sleeping, tame the lion with