A delf is a shovelful of sod or dirt. It is found in the canting arms of Delves, c.1460 [DBA2 298]; it was considered equivalent to a billet, in both blazon and emblazon.
The delf is always drawn in a highly stylized manner, as a square; and it’s treated more as a polygon than as an actual object. For related charges, see die, gameboard, tablet (weaver’s).
Vittorio Maria del Fabbro bears: Lozengy azure and argent, a delf sable.
Tibor of Rock Valley bears: Vert, a delf Or.
Angelique Thibodeau bears: Per chevron azure and argent, three delfs voided counterchanged.