Translation from a San Antonio newspaper in about 1970's.
Heraldica by Leodcadio Castano, Blason Hispano-American
ZERTUCHE--this is a noble name of Basque origin, it had its primitive origins in Gatica(Vizcaya) SPain. The primitive name was Sertucha, it changed its pronunciation in the year 1141, because of Don Juan-Jose Sertucha, Governor of Bilbao, supreme chief of the Attos Fueros (High laws), defender of the village called Zertuche where it took the name against the Moors, for this he was created Duke of Zertuche and Master of the order of Santiago. Prove your nobility in the order of Santiago in1726. One branch passed to Nuevo-Leon, Mexico with Don anguel Miguel Zertuche and Camacho, Baron of the House of Sertucha, Marquis of Mieres and Duke of Puertas married to Dona Soledad of the puertas and Robles of Armentero, Baroness of Armenteros. Different branch of this name pass to St. John of Tarranoa(Canada) with Don Antonio, Don Sebestian, Don Amado, Don Roberto and Don Tristan ZErtuche, partners and founders of the early codfish fishing Fleet that is now named ZErtuche & Pilsen. The largest in the world; they all married Spaniards, founding new plots of ground in Canada. Your coat of arms; in a field of silver, a cross full of ---(gules-lines??) and the right field eight panels of (sinople--seashells?) in a field of gold.
(I have more interesting bits if anyone wants to e-mail me directly.) This board has been quiet too long