Ethelberta Parson is the wife of Nat Parson, and the body of Frigg.
In Runemarks/Runelight[]
In Runemarks, Ethel is the faithful wife of Nat Parson. During a meeting of the gods she is killed in an accident with the Word. Idun revives her with a piece of god food and Ethel becomes an oracle. At the end of the book, Frigg inhabits her body.