Frank, there were two Beneux men (brothers) who served as lieutenants in the 34th Arkansas.
Horace Beneux and Virgil Beneux both enlisted in Co. I, 34th Arkansas Infantry, at Ozark, Arkansas, on July 2, 1862. Horace (born in 1840) was elected third lieutenant, Virgil (born in 1842) was elected first lieutenant. The brothers were at home on furlough when they were shot by bushwhackers on December 4, 1863. Virgil died of his wounds on December 23, and Horace died on December 30. I recall seeing the old Beneux house several years ago at Mulberry. Some of my wife's family still lives at Mulberry, and can recall the story of the killings of the Beneux boys.
A younger brother, Justin Beneux, Jr., also served in the 34th Arkansas, and survived the war.