I just found some old papers, a Daughters Of The American Revolution Application and I guess I am from a long line of Onderdonk's.
I am the last of my family line and have no living relatives that I know of. If I am related to you I would love to here from you.
Here is what it says:
Maria Vander Vliat was married to Audrias Onderdonk on 11/11/1683. They had a child, Adrian Onderdonk.
Andrian Onderdonk born and his wife Sara Snadeker had Audrias Onderdonk.
Audrias Onderdonk was born in 1707 and his wife Williamytze Van Houston who died on 3/17/1790 were married in 1738. They had a child Abraham Onderdonk who was born in New Hempsted N.Y. on the 9th day of May 1743. He died in Hempsted NY on 25 Nov 1823. During the Revolution he lived in Rockland Co. N.Y. I have of references to historical documents in this documnet. I will be happy to scan it and send it to any interested parties.
In this documnet it lists all my relatives up to Alice L. Morton Turner and is signed and dated 27 April 1927. Please contact me if we are related. :)