I just saw your post and realized it was close to the Kellow I am searching. There is a discrepancy or two.
The Joseph Kellow and Mary I know of were born in 1791 and 1802 respectively. Mary's name is not Brown. Nevertheless, the children that I know of are: William 1826, John 1829, Joseph1 1830, Mary 1832, Mary Jane 1833, Phillipa 1835, Richard 1836 and Elizabeth Jane 1845.
If you still check this site I would like to correspond with you.