APPELLATIONS AND EPITHETS
Generally capped and not quoted if well established:
Abe Lincoln, the Great Emancipator
Jenny Lind, the Swedish Nightingale
If less well established, lowercase within quotation marks:
Perle Mesta, "the hostess with the mostest."
Teddy considers himself the "bull of the woods."
His reward was to be dubbed "his rotundity."
See also NICKNAMES OF PERSONS.