I can't find any consensus on this Eustace's connections.
Here on Geni his mother is Margaret Hawkins. In Ancestry trees she shows as Rachel Hawkins in some trees and Jane Clements in others.
Here on Geni his faher is Edward Windham. In Ancestry trees he shows either as Reuben Windham or Edward Windham, both showing married to Jane Clements, and only one tree I've seen listing Margaret Hawkins as his mother with the father as Thomas Edward Windham.
There aren't any notes in his profile to indicate what is correct. The cousin tree I'm going through on Ancestry in my DNA matches has Eustace's parents as Capt. Reuben Windham I and Rachel Jane Clements.
His Wiki page has his father as Edward but no name for his mother:
https://www.wikitree.com/wiki/Windham-205
Thanks in advance for additional information / clarification on the correct connections for this Eustace.