English heraldry in the context of Scottish heraldry

In heraldry, the term star may refer to any star-shaped charge with any number of rays, which may appear straight or wavy, and may or may not be pierced. While there has been much confusion between the two due to their similar shape, a star with straight-sided rays is usually called a mullet in English heraldry, while one with wavy rays is usually called an estoile.

While a mullet may have any number of points, it is presumed to have five unless otherwise specified in the blazon, and pierced mullets are common; estoiles, however, are presumed to have six rays and (as of 1909) had not been found pierced. In Scottish heraldry, an estoile is the same as in English heraldry, but mullet refers only to a mullet pierced (also called a spur revel), while one that is not pierced is called a star.

A martlet in English heraldry is a mythical bird without feet that never roosts from the moment of its drop-birth until its death fall; martlets are proposed to be constantly on the wing. This condition is an allegory for continuous effort, expressed in heraldic charge depicting a stylised bird similar to a swift or a house martin, without feet. It should be distinguished from the merlette of French heraldry, which is a duck-like bird with a swan-neck and chopped-off beak and legs. The common swift rarely lands outside breeding season, and sleeps while airborne.

A knight banneret, sometimes known simply as banneret, was a medieval knight who led a company of troops during time of war under his own banner (which was square-shaped, in contrast to the tapering standard or the pennon flown by the lower-ranking knights) and was eligible to bear supporters in English heraldry. The military rank of a knight banneret was higher than a knight Bachelor (who fought under another's banner), but lower than an earl or duke.

Under English custom the rank of knight banneret could only be conferred by the sovereign on the field of battle. There were some technical exceptions to this; when his standard was on the field of battle he could be regarded as physically present though he was not. His proxy could be regarded as a sufficient substitution for his presence.