Yum in "The Mikado", is based on either a mistake of fact or  a deliberate alteration to make the story more romantic. In real  life, the name of Abrahams bride was Sybil Evers. Evers was a  member of the DOyly Carte Opera Company, but while Sybil Gordon was  its principal soprano, Sybil Evers was a minor soprano, who sang the  role of Peep