Cornwall is the part of England where the village of Henwood lies. I have not been able to find any connection to Cornwall, having our ancestors coming from Hampshire, England. Both Cornwall and Hampshire are in Southern England and on the English Channel that leads to the Atlantic Ocean. It's always possible that the origin of Henwood was Cornwall and that people migrated to other parts of England.
I have found a family from Cornwall that immigrated to Ohio.
1Joseph T. Henwood b: 1862 in St. Ives, Cornwall England.
m: Mary E. Mann
2. Charles Arthur Henwood b:
m: Anne Gad
3. Charles Arthur Henwood Jr. b:April 1, 1893 Smethick, Staffordshire, England, d: Sept 3, 1975 Lancaster, Ohio
m. Kathleen Lethbridge
4. Alfred Norman Henwood b: April 21, 1918 d: March 24, 1988
5. Douglas Edward Henwood b: Dec 19, 1949 d: May 14, 2008 Lancaster, Ohio .
Douglas may be the author of a book about Wall Street which is about financial markets.
While searching the author of the book, I found 13 different Doug Henwoods.
Research: ancestry.com , google