One of Waterdeep's many guilds is the Most Diligent League of Sail-makers and Cordwainers (listed in the introduction to Waterdeep: Dragon Heist, p. 13). What is a cordwainer in this context?
But Waterdeep already has an Order of Cobblers and Corvisers, and a League of Skinners and Tanners. Cordwainers are in a guild together with sail-makers, so it stands to reason that they would have some sort of connection to sail making.
Any D&D/Forgotten Realms source is acceptable.