Bottar is a Nord who can be found wandering Skyrim.
Bottar can be met in a random encounter in the wilds. He is one of the children (along with Sond) who will mark the location of Deep Folk Crossing for a small fee.
He and his friend Sond sell various Dwemer artifacts and random potions.
If they encounter a foe, they will duck for cover like other children in Skyrim.