Operating out of Armudstadt, the notorious city of corruption and deceit and centre of the Kingdom of Dernwich, the Duchampe Society takes its name from its founding father, one Vergrin Duchampe, who lived around the 18th century. Duchampe, an Elvish merchantman - or rather, a leader and “godfather” of a great deal of lower Elvish merchantmen, was notorious for his skill at wagers.
Surnames: The Chinese were among the very first cultures to adopt the use of hereditary surnames (around 2800 BC). But the custom didn't quite catch on in Europe - at least not until the Venetian aristocracy made it popular sometime between the 10th and 11th centuries AD. What culture made it popular in your setting and why?