Although Liberty had a Yearbook before the formation of The Cauldron, it wasn't formally called "The Cauldron" until 1925 when the name came from the idea that a witches cauldron is filled with all types of "Imaginable odds and ends were put." Which then placed the idea of  stirring the "Important and interesting doings of the term." 

*See more info on the left from the 50th anniversary book