More on Knights of St Crispin from Infoplease:

• Knights of St. Crispin - Knights of St. Crispin Shoemakers. Crispin Crispian was a shoe maker. (See Henry V., iv. 3.) ...
• Dictionary of Phrase and Fable: K - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "K"