Does anyone know which Hannah married George Miller?

George Miller was a son of Stephen Miller and Henrietta Hardin. He was born ca 1808, probably in Clay or Perry Co, KY. He's found in the 1840 Breathitt census living next to his widowed mother, Henrietta Miller. He had a wife and 2 daughters under 5 years old. By 1850 George and Hannah had moved their family to Cole Co, MO.

1850 United States Federal Census
Cole Co, Missouri
George Miller 42 m farmer KY
Hannah Miller 32 f KY
Catharine Miller 14 f KY
Christianna Miller 11 f KY
Huram Miller 9 m KY
Margaret Miller 7 f MO
Elizabeth Miller 4 f MO
Henrietta Miller 1 f MO

1860 United States Federal Census
Moniteau Co, Missouri
George Miller 52 m farmer KY
Hannah Miller 42 f KY
Catharine Miller 24 f KY
Christina Miller 21 f KY
Hiram Miller 18 m KY
Margaret Miller 17 f MO
Elizabeth Miller 14 f MO
Henrietta Miller 12 f MO
George W Miller 8 m MO
Sarah E Miller 6 f MO
John W Miller 4 m MO
M L Miller 2 f MO

Most of the family disappears after 1860, at least as far as the census goes. Does anyone know what happened to them?