The bad news first, I don't know the answer to the Roden/Pannell connection.My branch of Pannells left SC for old Pontotoc Co., MS between 1840 and 1850 so my original knowledge begins there.My grandfather could have answered most of our questions, he had a great memory and loved to tell family stories, however he died in 1958 and I did not begin a serious search until the 1980's.By then my mother was forgetting and mixing up names.
I do know that my branch came from Anderson/Andrew Pannell-called Andy-and that his sons were Daniel, Littleton, Richard, David, Elias Mitchell, and Anderson W. I believe they were born in that order. (Richard, David, Elias and Anderson W. migrated to MS.) He had daughters whose names had been forgotten by the family but a Dove descendant in I think Arizona told me that Nancy Ann Pannell was his daughter and married Richard Dove, son of Benjamin Dove. I agree with you that there is a connection between the Pannell family and Doves.
I wondered for a while if Anderson and Andrew were two different men, but I was able to compare three deeds fir the same piece of land as it changed hands where part of the description was that it adjoined his land and in one sentence called him Andrew and in another called him Anderson.The second deed repeated the first, but in the third deed the buyer was Richard Pannell, his son, and both times his name was written down as Anderson.
I am sorry to say that I don't have any legal documents that name Anderson's children.In 1848 he sold all his property to Henry Castles with the provision that he could live on the property until his death or if he moved.His wife, Elizabeth signed away her dower rights. The SC Archives did not turn up an estate settlement on him when I requested it, so apparently he had nothing when he died.He was living in 1860, alone and after that I have nothing.
About the Littleton Pannell in MS 1880, he is the son of Elias Mitchell Pannell.His name is Littleton D. Marion, don't know know what the D stands for.In 1850 there was an apparent misunderstanding and the census taker wrote Demarion for his name.My family called him Uncle Marion.His Civil War record in MS was L.D.M. Pannell.When he married the first time it was under the name of Marion, the second time it was L.D. and the third time it was L.D.M.I'm sure that is a lot more than you wanted to know, but it interesting to me that the brothers named their sons after each other, over and over. It gets confusing.
I imagine you have looked at 1850, but in case you haven't I have looked up Benjamin Arp and have their names in Monroe Co.They were living in the 16th Civil District, page 108b.
My mother's parents were both descended from Anderson, my Grandmother through Richard and my grandfather through Elias Mitchell.
I hope this has helped in some way.If I come up with anything, I'll let you know.