William Fife Jr., also known as William Fife III, was the third generation of a family of Scottish yacht designers and builders. In his time, William Fife designed around 600 yachts, including two contenders for the America's Cup. The Royal Yachting Association was formed in 1875 to standardise rules, and Fife and his rival G.L. Watson, were instrumental in these rule changes. Around one third of Fife's yachts still exist. His last designs were built in 1938.

Fairlie is a village in North Ayrshire, Scotland.