Although the memorandum book only lists heads-of-household, Francis Suter (Jane's husband) purchased enough food rations for three people, later census records show the family to be living together, first in Nebraska, then back in Utah by 1880, further confirming they traveled together in this company. Death certificate of their son Frank, also confirms Jane and Francis' marriage.
In some sources (including her death certificate) last name is spelled "Sutter".