The “cross tripartite (or triple-parted) and fretted” may also be blazoned a “cross of three pallets fretted with three barrulets”. It’s a period treatment, found in the arms of Skirlaw, 1406 [Boutell 49].
Druscilla Galbraith bears: Vert, a cross triple-parted and fretted argent.
Elena Wyth bears: Argent, a cross triply parted and fretted within a bordure azure.