John May Sr or Jan Maij (1694 – 1779) was an English shipwright from Chatham who served from 1758-1779 as Master Shipbuilder of the Amsterdam Admiralty.
His son John May Jr or Johannes Maij (Rochester (1724-1782) married Martha Naudin in March 1753; the couple had five daughters.
In 1793 John's daughter Elisabeth married Paul Busti, a real estate agent, operating the Holland Land Company in Philadelphia.
[10] William May (Maij) (Chatham 1725-1807), a captain and equipment master from 1780, devised various innovations in shipbuilding and cooperated with Robert Seppings.
William was the father of Job Seaborn May, midshipman and Rear Admiral, who played an important role on 15 November 1813 so the French general Molitor decided to leave Amsterdam.