Jessant, (fr. issant), shooting or giving forth: is often used for issuant, and sometimes, though erroneously, for naissant. The term is chiefly applied to the fleur-de-lis, and the phrase jessant-de-lis is used with respect to a leopard's head having a fleur-de-lis passing through it, as in the insignia of the See of HEREFORD; though there seems to be some doubt whether the reversing of the leopard's head was not by accident, since in the reign of Edward III. the blazon makes no mention of the fact.
Sable, a leopard's head[or face] argent, jessant a fleur-de-lis or--MORLEY, Hants, &c.
Argent, a lion rampant guardant gules royally crowned or, between two chess-rooks in chief sable and a cup in base gold, jessant a flame proper; a bordure azure--OGILVIE, Ruthven, Scotland.
Sable, in chief a lion passant guardant, in base a leopard's head jessant-de-lis or. [Another, Argent, on two bars sable three leopard's heads or jessant fleurs-de-lis of the first]--MORELAND.
Sire Johan de CAUNTELO, de azure a iij flures de or od testes de lupars yssauns--Roll, temp. ED. II.
Gules, three leopard's faces reversed jessant-de-lys or--Walter de CANTILUPE, Bp. of Worcester, 1236-66; and Thomas de CANTILUPE, Bp. of Hereford, 1275-82; and afterwards the Insignia of the See of HEREFORD.
Gules, ten crescents each jessant a quatrefoil argent--RONGROLLIS.
Or, a fesse chequy argent and azure between three crescents jessant as many crosses-croslet fitchy gules--ROWANS, Scotland.