From Katherine Hope Borges I have learned by studying her new chart that Hampshire County, where our Henwoods seemed to be from, in the southeast, was populated by the ancient Britons with the tribes of Belgae in the South and Atrebates in the North. This goes back to 43 BCE.
Then the Romans were in Hampshire from 43 ACE to 410 ACE. They were replaced by the Saxons.
The Normans took over the area in 410 ACE to 878ACE. England was conquered by them in 1066. Ireland was conquered by 1169, and finally Wales was taken over by 1282. Wikipedia tells us that the Normans were the people who gave their name to Normandy, a region in northern France. They were descended from Viking conquerors of the territory and the native population of mostly Frankish and Gallo-Roman stock.