Gawdy had married Lettice Knollys, daughter of Sir Robert Knollys and Catherine Vaughan, and had eight children.
Robert Knolles (c. 1320–1407), also known as Knollys, English soldier of the Hundred Years' War
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Knollys is said by Dugdale to have been descended from Sir Robert Knollys or Knolles (d 1407), the soldier, but, according to Sidney Lee in the Dictionary of National Biography, this is an error.