Found the following Houstons in the Whitfield / Ross Brigade:
HOUSTON, Frank J., Pvt, Co. A, 27th TX CAV
HOUSTON, John T., Pvt, Co. A, 27th TX CAV
HOUSTON, Lewis, Co. "B”, 6th TX CAV
HOUSTON, Newton J., Co. , 6th TX CAV
The 27th TX Cavalry Regiment (1st Texas Legion) was recruited in La Vaca, Hunt, Jasper and St Augustine with one additional company from Arkansas.
The 6th TX Cavalry Regiment was recruited in Bell, Collin, Dallas, Henderson, Kaufman, Limestone, McLennan, Travis, Van Zandt and Waco Counties.
Not familar with Houstons family.