Hi Kaleena,
It would depend on the type of report you're running. If the report is the type of Survey Answers, then each registrant's answer will pull on its own row of the report. So if I answered two registration questions, you will see two rows with my name associated.
If you only want to see registrants' names once, then you can use the Grouping tab of the custom report to group by full name or create a new custom report with the type of All Attendees.
Best,
Julia