John W. Thomson, Alamo defender, son of William Russell and Elizabeth (Sabb) Thomson, was born in Louisa County, Virginia, in 1807. He was a doctor by profession. He traveled to Texas from North Carolina in late 1835 and joined the Volunteer Auxiliary Corps of Texas at Nacogdoches on January 14, 1836. From Nacogdoches, Thomson traveled to Washington-on-the-Brazos as a member of Captain Gilmer's company. There he left the company and traveled on to San Antonio de Béxar. Although it is not known conclusively, Thomson may have served the Alamo garrison in the capacity of surgeon. He died in the battle of the Alamo on March 6, 1836.