More on Frateretto from Infoplease:

• Frateretto - Frateretto A fiend mentioned by Edgar in the tragedy of King Lear. “Frateretto calls me, and ...
• William Shakespeare: King Lear, Act III, Scene VI - Here is better than the open air; take it thankfully. I will piece out the comfort with what addition I can: I will not be long from you.
• Dictionary of Phrase and Fable: F - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "F"