Baillie Tolkien
From Tolkien Gateway
Baillie Tolkien, née Klass is the second wife of Christopher Tolkien, J.R.R. Tolkien's third son, with whom she had two children, Adam and Rachel. She edited J.R.R. Tolkien's The Father Christmas Letters for posthumous publication.
Christopher dedicated The Peoples of Middle-earth and The Children of Húrin to her.