No, I am not saying the information you ran across was incorrect. I was correcting the statement that Companies B and C were predominately raised from men in Claiborne Parish. Companies C and D were, but with a few exceptions the men that formed the Robins Grays, Company B, were from Bossier Parish. It does appear that at least one of the men enlisted in a Bossier Parish company but was living in Minden. The three men with the surname you are researching (although spelled slightly different) are listed in Company B. They are W. A. J. Newsome; John Newsome; and Henry Newsome. (source: page 79, "Bossier Parish History: The First 150 Years, 1843 - 1993" by Clifton D. Cardin. The notes besides two of the men say - John Newsome (wounded at Chickamauga; lived near Minden)and Henry Newsome (killed in Georgia, 1864).
Also, I have the information from John B. Newsom's Confederate Land Warrant Application (Warrant #358)which states the following -
Pvt. John B. Newsom, Co. B, 19th LA. Infantry, Webster Parish
"wounded by a gunshot through the left breast at the battle of Chickamauga, GA. on September 20, 1863. Said wound has partially disabled him in the left arm so he cannot work on a farm which is his only means of making a living." He is listed as a farmer and his witnesses were James H. Smith, W. H. Bledsoe, and H. Rathbun.
Please ask the WEBMASTER to send you my email address. I might have some additional information which may assist you.