Alexander sisters of TN

Am looking for more info on the following Alexander sisters:
(1)Mary Ann Alexander m William Findley 12 May 1842,Roane co TN.THey had at least one son:Tom
(2)Louisa E. Alexander m Thomas L. Rodgers 9 Dec 1860.Not sure if they had any kids, but do know that THomas Rodgers already had a son (Tom)from a previous marriage
(3)Elizabeth Evaline Alexander b.26 May 1827 d.June 1896, POlk Co. MO
SHe Married William Amazy WATSON on 29 Aug 1855, Roane co TN.THeir children:William, RObert Martin, Elias JAckson, Mary Louisa, George, Sarah JAne and Charles Lee. (ALso had stepchildren from William Watson's prior marriage:Samuel Naff, James Leander, John Henry, Josiah)
ALl i know about these sisters is that their Father was born in NC and their mother in Kentucky.

Elizabeth Evaline Alexander-Watson moved to MO (polk co) in 1871 from Roane co TN, with her husband and family and her nephew Tom Findley and step-nephew Tom ROdgers.
KNow it's a lot but any info greatly appreciated.Willing to help wherever i can!!