Mother of the Walruses is a myth of the Chukchi on the opposite side of the Bering Straight from Alaska. It is a tale of a girl who has her fingers cut off, but has not connection to the story of Sedna. This tale represents a completely separate deity. A.G.H.
Grimal, Pierre, Larousse World Mythology, Secaucus, New Jersey, Chartwell Books, 1965, p. 443