Inga Swenson played Inger Cartwright, the mother of Hoss on Bonanza.
This is the continuation of the story of Ben and his second wife, Inger, which had begun in Season 3, Episode 29, "Inger My Love". Inger continues to raise her step-son, Adam as her own.
The Uncle of Eric asked his sister to name her baby "Hoss" as that had also been his nickname.