Dutch Brandy producers decided upon the name “Vieux”, which had already been used before - it is French for “old” and was often used to describe Old Dutch Brandy (“Cognac Vieux”) – and which did not provide any pronunciation difficulties. Around that time, Gerrit Herman Plantinga (born 1929, son of Louwrens Baltus Plantinga (1902-1993), who was son of Gerrit Herman Plantinga (1876-1962), who was in turn son of Klaas Plantinga, founder of the Plantinga distillery) thought up the Plantiac name. He and some of his colleagues working at Philips' Natlab constructed it from the family name ("Planti-") and the name 'cognac' ("-ac"). The Plantiac name was first seen used in a 1961 advertisement, although that year also saw advertisements still using the name "Plantinga's Cognac Vieux". Plantiac became an official registered trademark on 8 April 1971.