My tickets only show one name
Some tickets (like German DB or Austrian OBB tickets) are booked on one name only for the whole group using them. It is, however, valid for the amount of people stated next to, or under, the name (e.g. 2 adults).
This name is selected randomly by the ticketing software and cannot be changed. If a bar code on the ticket is needed to open a ticket barrier, it can be used multiple times (for all passengers).