You've been great! DN Poss has been a challenge to a few researchers and I'm so glad we've made the connection to the Tiller family, of which there is much information (esp. at Rootsweb WorldConnect).
I, too, believe that Andrew "Andy" POSS and Nicholas POSS who married Tiller sisters were related...maybe even descendents of the Nicholas POSS of Rockingham County, VA. There has been some discussion about this Nicholas POSS on the forum in the past, as well as in Liz Frano's document POSS PUZZLE.
Interestingly enough, there was also a Christopher POSS from Rockingham County, VA. He might be related to the Nicholas mentioned above.
Again, thanks for helping the Arkansas POSS' make their familial connections! It had been said that DN Poss and Elijah Poss were related, we just didn't know that they were brothers!