Did two of these youngest daughters die before the 1820 Census?

Walter > Thomas

2 Thomas Downeys age 13.

Lawrence, 50, Coal Digger, $200, IRE
Margaret,47,Keeping House, IRE
Mary, 15, At Home, PA
Thomas, 13, At Home, OH
James, 11, At Home, OH
Margie, 9, At Home, OH
Elizabeth, 7, At Home, OH
William, 4, At Home, OH

It is possible that son Thomas is duplicated in this Census. An old Downey family Picture has Tom Gaynor written on the back of it and we find a another Thomas Downey, age 13 entry in Clayton Township in the Gainer home:

Gainer, Phillip, 87, Farmer, 7000-2000, Ireland
Ann, 69, Kpng Hm, Ireland
Maria, 39, Hlpng Moth, OH
Thomas, 37, Works on Farm, OH
Elizabeth, 28, Hlpng Brother, OH
Downey , Thomas, 13, Wrks on Frm, OH

Thomas Downey in the Thomas Elder Home:,
Elder, Thomas, 71, MD
--- Hannah 25, OH
--- Daniel, 22, OH
Downey, Thomas, 52, IRE
Elder, William, 5, OH
Is this the same Thomas Downey who, in 1860 at age 40, lived with Lawrence and Margaret Downey in the same county?

Thomas Downey in widow Mooter's home:
dwelling 192
Mooter, Mary, 75, Wid, GER, GER, GER
--- Henry, son, single, 32, OH, GER, GER
Downey, Thomas, single, 68, IRE, IRE, IRE (space for relationship to head is blank)
Note: dwelling 199 is another Mooter home - and 3 dwellings further (P58B) is:
Elder, Hannah, widow, 32, OH, MD, MD
--- William, son, 15, OH, OH, OH
--- Mary, daughter, 10, OH, OH, OH
--- Sarah, twins, 10, OH, OH, OH

In addition to the above, there are 4 other Hannah Elders in 1880 Perry County:
1. Reading P61D- Age 12, dau of Asbury Elder Jr.
2. Reading P62B- Age 13, dau of Asbury Elder
3. Reading P63C- Age 30, wife of Levi Elder
4. Jackson P178D- Age 55, widow with son and g-kids.