In heraldry, a double quatrefoil, which has this many leaves, actually represents a ninth son
... "The regulation 
of English heraldry between 1530 and 1688 has led many writers to project back 
.... Chaplet = (Floral) Usually with green leaves and four roses: the crown of joy 
and admiration .... Huitfoil = (double quatrefoil) Mark of cadency for the ninth son [DOC] [TLE] Cadency - Wikipedia [PAR] In heraldry, cadency is any systematic way of distinguishing otherwise identical 
coats of arms ... Because heraldic designs may be used by sons whilst their 
father is still alive, some ...