Knights bannerets pl. : of Knight banneret

Example:


Taxonomy
Knights, Bannerets, Fact Monster, Square Flag, Medieval History, Dictionary of Phrase and Fable, the Square, King James version, Reference Desk, field of battle, cut off, square, E. Cobham Brewer, warrior, translation, J. M. Rodwell, Charles and Mary Lamb, Family Education Network.

Defination from the web:
Knights Bannerets. Knights created on the field of battle. The king or general cut off the point of their flag, and made it square, so as to resemble a banner. ... Hence knights bannerets are called Knights of the Square Flag. Source: Dictionary of Phrase and Fable, E. Cobham Brewer, ...