Nothing seems to be known about Simeon Asa Anderson's birth date, date of death or descendants. Below from Texas State Historical Association http://www.tshaonline.org/handbook/online/articles/fan11.

ANDERSON, SIMEON ASA (?–?). Simeon Asa Anderson, one of Stephen F. Austin's Old Three Hundred, received title on August 10, 1824, to a league of land now in Fayette County. The census of Austin's colony of March 1826 listed him as a farmer and stock raiser aged between twenty-five and forty; his household consisted of his wife, a son, two daughters, and a slave. Anderson wrote Austin in May 1826 that he had had no opportunity to see him but was making arrangements to pay for his land. BIBLIOGRAPHY:

Eugene C. Barker, ed., The Austin Papers (3 vols., Washington: GPO, 1924–28). Lester G. Bugbee, "The Old Three Hundred: A List of Settlers in Austin's First Colony," Quarterly of the Texas State Historical Association 1 (October 1897). '