The clerks who later transcribed this (above) "H_____" surname for index purposes,
transcribed it as "Houston." 
However, compare the "a"( 5th letter) in Elizabeth with the 2nd letter in "H_____."
Also, compare the "i" (3rd letter) in Elizabeth with the 3rd letter in the surname.
Also, compare the 4th letter in the H____ surname with the "s" at the end of "James" (see below).
Was Elizabeth's surname "Haiston," rather than "Houston?"