I believe this person is John Jacob Jontry, brother of John Alexander Jontry, and probably the brother of Charles Jontry. The family name was originally Tschantre, originating in Switzerland.
The present day descendents are not related to the Jontry family still residing in New Jersey, but I do know who they are and where that family extends, at least to some degree.
There are a lot of Tschantre's in the US, and us Jontry's are making somewhat of a comeback.
Please RSVP when you have time. I know a lot more but have a stack of questions. Will usually answer e-mail within a couple days if I am not work traveling.
Michael J. Jontry
3210 Fields Court
Decatur, IL 62521S53748@aol.com