John Leach, of Salem

John "Leech," brother of Lawrence Leach, was received as an inhabitant of Salem on 23 Jan 1636/7. When this John Leech left a nuncupative will in 1658, he left his estate to John Leach, son of Richard Leach (son of Lawrence).

In other words, he had no descendants.

Source: Robert Charles Anderson, The Great Migration Begins: Immigrants to New England 1620-1633, Volumes I-III, 3 vols. (1995), 2:1163 (in particular part); digital images, American Ancestors (http://www.americanancestors.org/).