E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Montgomery,
in North Wales; so called from Roger de Montgomery, Earl of Shrewsbury, who won the castle of Baldwyn, lieutenant of the marches to William the Conqueror. Before this time it was called Tre Faldwyn.
1
Montgomerys division, all on one side. This is a French proverb, and refers to the Free Companies of the sixteenth century, of which Montgomery was a noted chief. The booty he took was all given to his banditti, and nothing was left to the victims. (See LIONS SHARE.)