Baillie Tolkien
From Tolkien Gateway
Baillie Tolkien 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 to her the twelfth volume of The History of Middle-earth, entitled The Peoples of Middle-earth.