Here's further information that may help you track them down: Maria Hoose's older sister (b 1822), Catherine, married my GG Grandfather, John Cumming Graham, 20 Sep 1840, in Stamford Twp, Delaware Co, NY. She was born in Stamford Twp, as was her brother, Robert, 27 Jan 1830. I don't know where the younger children were born.
Circa 1847, Catherine and John moved to Standingstone (now Towanda), Bradford Co, PA 25-30 miles from Rush, where they bought an old farm. I don't know anything further about Maria and Alexander. I got their names from notes my grandmother left concerning her mother's siblings.
I hope this helps. Feel free to contact me for any futher information I have that might be useful.