William E. Rosser had an older brother, whom he must surely have admired:

Thomas Lafayette "Tex" Rosser, (October 15, 1836 – March 29, 1910) who rose in rank to Major General, CSA, and
who commanded the 5th Virginia Cavalry and fought in the Civil War at:

First Battle of Manassas
Seven Days Battles
Battle of Beaver Dam Creek
Second Battle of Manassas
Battle of South Mountain
Battle of Sharpsburg
Battle of Kelly's Ford
Battle of Hanover
Battle of Gettysburg
Battle of the Wilderness
Battle of Trevilian Station
Battle of Cedar Creek
Battle of Tom's Brook
Siege of Petersburg
Appomattox Campaign, and also in the
Spanish–American War (Brig. Gen. USA)