Many breeds mix with Giant Schnauzers, including:
Giant Bolonauzer (Giant Schnauzer + Bolognese)
Giant Border Schnollie (Giant Schnauzer + Border Collie)
Giant Irish Wolf Schnauzer (Giant Schnauzer + Irish Wolfhound)
Irish Wolf Schnauzer (Giant Schnauzer + Irish Wolfhound)
Giant Kerry Blue Schnauzer (Giant Schnauzer + Kerry Blue Terrier)
Giant Schnauzer Chin (Giant Schnauzer + Japanese Chin)
Giant Ratzer (Giant Schnauzer + Rat Terrier)
Giant Schnoodle (Giant Schnauzer + Standard Poodle)
Giant Wauzer (Giant Schnauzer + Westie)