The “cross swallowtailed” is found in the arms of de Marinonibus, mid-15th C. [Triv 217], where it’s blazoned a “cross of eight points”. However, the latter term can also refer to the Maltese cross [Franklyn 118], so the Society’s term is preferred.
Eric of the Broken Cross bears: Gules, a cross swallowtailed azure fimbriated Or.
Savaric de Pardieu bears: Quarterly argent and sable, in saltire five crosses swallowtailed counterchanged.
John Teller bears: Quarterly sable and Or, a Latin cross swallowtailed argent.