The “Latin cross” is also called a “long cross” or a “Passion cross” [Parker 160]. It’s simply a cross couped with the lower limb elongated. It’s found in the arms of Cardinal Isidorus, c.1550 [BSB Cod.Icon 267:193].
Caedmon Wilson bears: Argent, three Latin crosses azure.
Faílenn inghean Mheanmain bears: Quarterly vert and argent, two Latin crosses in bend Or.