I know you have some of this, so good luck in your search.

Zachariah Nack sr.abt 1818 Georgia
[Zachariah T Nash] age 32
spouse nancy age 26 abt 1824
children
Zachariah Nack jr.abt 1846 Alabama age 4 [Zachariah Nash]
virginia 7
mary e 5
Source Citation: Year: 1850; Census Place: Montgomery Ward 3, Montgomery, Alabama; Roll: M432_12; Page: 139; Image: 140
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Name: Zacharie Nash
Age in 1860: 13
Birth Year: abt 1847
Birthplace: Alabama
Z. T. Nash age 42 abt 1818 GA /
Occupation Carpenter
Nancy age 37 abt 1823 South Carolina
children
Virginia 17 abt 1843 AL, Mary 15 abt 1845 AL, Zacharie jr.13 abt 1847 AL ,
Woodward 6 abt 1854 AL , Joseph 2 abt 1858 AL
Source Citation: Year: 1860; Census Place: New Orleans Ward 3, Orleans, Louisiana; Roll: M653_417; Page: 0; Image: 364
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Boys House of Refuge
[TRADE SCHOOL youngs boys age 9 & up]
1870 census
Line 35 Name: Joseph Nash {shoe maker}
Estimated Birth Year: abt 1857
Age13. Birthplace: Alabama

Line 22 Name: Woodward Nash age 17, abt 1854, [shoe maker]
Birthplace: Alabama
Post Office: New Orleans
Source Citation: Year: 1870; Census Place: New Orleans Ward 3, Orleans, Louisiana; Roll: M593_520; Page: 577; Image: 352 [July 1870]
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http://usgwarchives.org
http://www.usgwarchives.org/la/orleans.htm
http://usgwarchives.org/la/lafiles.htm
http://obits.gno.lib.la.us/nopl/obitindex.htm