Secondary sources say Peter was born in Greene Co., TN — presumably based on where his marriage was licensed — but Peter's parents lived in Washington Co., TN, from at least 1792 to 1832.

Secondary sources say Achsah was born in Greene Co., TN — presumably based on where her marriage was licensed — but if Charles and Rebecca are her parents, which seems very likely (see discussion), she was born in Washington Co.  Couples sometimes ran off and got married in an adjacent county, so the county where the marriage license was obtained isn't necessarily the county of residence of the couple, or of their birth, or of their children's births — or even where the wedding ceremony actually took place.  Tax and census records are a better indication of where the couple was actually living. 

Secondary sources have the first two children born in Greene Co. — presumably based on where their parents' marriage was licensed — but records in 1830 and 1832 show the family to be in Monroe Co., so Leannah, at least, was not born in Greene Co.

1.  Byron Sistler & Barbara Sistler.  1987.  Early East Tennessee Marriages, Vol. 1, Grooms.  Byron Sistler & Assoc., Inc., Nashville, TN.  On p. 317:

Ruble, Peter to Axey McCrae 2-10-1823 [Ge]

2.  Census Index:  U.S. Selected Counties, 1830 (Broderbund CD-315):

1830 Census	Rubell, Peter	TN	Monroe Co.	p. 4
1832	Rubell, Peter	TN	Monroe Co.

Also in Monroe Co.:  Peter's brother, Joseph RUBLE. 

3.  Census Index:  U.S. Selected Counties, 1840 (Broderbund CD-316):

1840

Ruble, Peter

MO

Wayne Co.

p. 232

Also in Wayne Co., on the same page:  Peter's brother, Joseph RUBLE. 

4.  Census Index:  U.S. Selected Counties, 1850 (Broderbund CD-317):

1850	Ruble, Peter	MO	Wayne Co.	101st District	p. 193
1850	Ruble, Massa	MO	Wayne Co.	101st District	p. 193
1850	Rubble, Henry	MO	Wayne Co.	101st District	p. 193

It is very unlikely that Massa would be a "head-of-household," so I suspect this is a case where Peter's record spans two pages, with Massa at the top of the second page.  It is Broderbund's policy to index the first name on the page, whether it is a head-of-household or not.  Also, who is Henry?  And where is Joseph?

5.  Census Index:  U.S. Selected Counties, 1860 (Broderbund CD-318):  no MO on CD.

6.  Census Index:  U.S. Selected Counties, 1870 (Broderbund CD-319):  no MO on CD.

7.  Census Index:  U.S. Selected Counties, 1880 (Broderbund CD-320):  no MO on CD.

8.  LDS.  Family Search: Internet Genealogy Service: Ancestral File.

9.  WorldConnect (online at RootsWeb.com).

10.  Email from Bob Warden.