An Etymological Dictionary of the German Language/Standarte
Standarte, f., ‘standard, banner,’ from the equiv. MidHG. stanthart (standert), m. Borrowed in the 13th cent. from OFr. estendard (Fr. étendard), ‘flag,’ or preferably from the equiv. Ital. stendardo, which. is based on Lat. extendere. From the same source E. standard is derived.