Did you know Annie applied for a TX Confederate widow's pension?It apparently was rejected, but one of the good things about government records they keep them around.You could obtain a copy of her application.
The only Suttle I find on the Soldier's and Sailor's Civil War site is Isaac T.I wonder if he is the same Isaac on the census with Thos. in 1860?Probably a brother, or at least a cousin, as Thomas names a son Isaac.
I was checking for any possible matches for you on the Suttle Forum and say your post there, with more info.I guess Isaac is a brother to Thomas.You mention one of the sisters getting married in Drew Co, AR.I may be suggesting something you've alread tried, but did you check for land records in Drew Co, AR for any Suttle records?See if someone died, and heirshad to sign off to give clear title to the buyer.
With a little more searching I find someone on the AL Forum mentions Suttle in Winston Co, AL.I went to the GenWeb site for that county, an Isaac Suttle obtains land in 1841 -- hmmmm.1840 census shows Isaac Suttle with several people in his household and 2 males under 5, one of them could be the young Isaac in TX.I think I'd look at land records for Winston Co, AL.If Isaac (Sr.) died, his widow mayhave remarried and maybe his children didn't like the new stepfather.I have a family where kids were splitting right and left from AL going off to TX, on their on and with married siblings, because they didn't like new stepmother.