A client of Madame Sosostris, famous clairvoyante, in T.S. Eliot's poem The Waste Land.

The Greek root of her name, equus, means horse. Madame Sosostris has a bad cold, and may herself be hoarse.

The Latin root of her name, eques, means horseman or knight. Combined, we would have a knight mare.

The letters in her name, rearranged, spell "quiet one".

These insights and/or red herrings come courtesy of "Notes and Observations on T. S. Eliot's Early Poems", by Patricia Sloane.

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Gritchka says: Tell Ms. Sloane the Greek bit is an especially red herring: Greek for horse is hippos. Latin for horse is equus, which gives the derivative eques, equitis 'horseman'.