I descend from two of Aaron's siblings (yes, two of them).
First of all, I have just noticed a discrepancy in the birth date I gave you for Aaron Ostrander.
On another page, where it lists his siblings, it indicates Aaron was b. 21 Feb 1813 (page 258). I believe I have seen Presbyterian Church records from Ithaca, NY on-line or they are in Ancestry's database. Anyhow, take that with a grain of salt, until proven.
Aaron Ostrander's parents were:
Petrus Ostrander b. 2 Jan 1769 bpt 21 Jan 1770 Rhinebeck Flats Reformed Dutch Church, Rhinebeck, Dutchess County, NY d. 26 Nov 1851 Varna, NY; buried East Lawn Cemetery, Ithaca, NY
Hannah O. Acker b. 7 Sep 1777 Amsterdam, NY d. 6 Dec 1866 Varna, NY; buried East Lawn Cemetery, Ithaca, NY
A marriage date for Petrus and Hannah is not given.
I know about the tradition of waiting 'til Spring ...
If you want any other details, let me know. Unfortunately, they didn't write out the lineage for Frances so I don't have anything re. her children.