Four or more generations of descendants of John (Longitude) Harrison (1693-1776) if they are properly linked:
1. John (Longitude) Harrison (1693-1776)
- 2. John Harrison (c1719-1738)
- 2. William Harrison (1728-1815)
- 2. Elizabeth Harrison (1732-)
Four or more generations of descendants of John (Longitude) Harrison (1693-1776) if they are properly linked:
1. John (Longitude) Harrison (1693-1776)