My Family Tree

1820: Salisbury, Rowan Co, NC with known children, but no Elizabeth (next door to Wiley Coats) but 6 doors away is Sarah Miller with numerous daughters.
In 1810, the only Miller in Salisbury is "George Miller" with what looks like 5 brothers in the hh. Might be Thomas and Nancy but no children.

Possible parents of Elizabeth but unproven - Just as likely Elizabeth is only a neice of Thomas Miller. Family from jnlklm's family tree on ancestry.com

His will mentions only his wife Nancy, son Alexander, and other heirs:
"State of Indiana Pike County August the 14th 1848
I Thomas Miller of the state and County aforesaid having
Considered the uncertainty of this mortal life do make this
my last will and testament in manner & form following
first That my Body be decently buried & my Just debts paid
Second That my wife Nancy Miller shall keep the Land
her lifetime and after her death my son Alexander Miller to
have the same & one two horse plow & one Iron tooth harrow
& the gearing devises swingletrees log chain & c. Also one
mare & colt & some planes & the present growing crop to be
divided between my wife nacy & son Alexander Miller &
the rest of my Estate to be divided Equally among all of
my heirs In testimony where of I have hereunto set
my hand seal at the date above written
his
In the presents of Thomas X Miller {seal}
Andrew West mark
Henry Borders Jr "

Other children mentioned here -
http://www.mytrees.com/ancestry/Indiana/Died-1860/Cr/Criswell-family/Nancy-Criswell-su000922-181.html
Jacob b.1808
Nancy b.1822
Mary Polly b.1825

Jeanne Bedwell tree on ancestry.com has:
William Miller 1800–
Phoebe Miller 1805–1870
Jacob (Jackson) Miller 1808–1850
Alexander Miller 1809–1907
John Miller 1811–1884
Obedience Miller 1814–1873
Nancy Miller 1822–1860
Mary "Polly" Miller 1825–1915