Urban II was a descendant of a noble family in Châtillon-sur-Marne in Champagne region in France. He became the Pope AD 1088.
His papacy promoted the popularity of champagne in two distinct ways.
First one was obvious that since he was the Pope, people visiting him brought along wine from his native region to impress him. This wine was champagne.
The other reason was that Pope Urban II started the Crusades. This resulted in a long period of peace in the constantly war torn Champagne region since now the regional warlords were out fighting in the middle east. The peace which prevailed promoted trade and the famous Champagne Trade Fairs started to be held. Champagne used to given as free gift along with mostly woollen trade items which were sold in these fairs by local traders. This took the name of champagne to far off countries.