Yes, Henry Salinger is David P Salinger's brother.
Thank you so much for your help.
Your assistance with my query has answered a question about the name of David P Salinger's 4th daughter.He named her Henry (for his brother Henry who died in the Dakotas) with the middle name Dakota (for his service in the Dakotas). (David eventually had 3 sons.)
His daughter went my the name Codie, a shortened version of Dakota.She is buried under the name Henry Dakota Salinger Browning in the Browning-Sallinger Cemetery, Washington County, North Carolina.