Gules, (fr. gueules): the heraldic name of the tincture red. The term is probably derived from the Arabic gule, a red rose, just as the azure was derived from a word in the same language, signifying a blue stone. The word was, not doubt, introduced by the Crusaders. Heralds have, however, guessed it to be derived from the Latin gula, which in old French is found as gueule, i.e. the "red throat of an animal." Others, again, have tried to find the origin in the Hebrew word gulade, which signifies red cloth. Gules is denoted in engravings by numerous perpendicular lines. Heralds was blazoned by planets and jewels called it Mars, and Ruby.
The name variously spelt goules, goulez, goulz, gowlys, occurs frequently in ancient rolls of arms, as will have been observed by the examples given throughout the Glossary.
"Mes Eumenions de la BRETTE La baner ot tout rougette." Siege of Carlaverock.