Attendee (noun)

1. A person who is present at an event or meeting.
2. A person who is present at a gathering or conference.

Origin:

Early 19th century: from attend + -ee.

Examples:

1. The attendee list included many notable figures.
2. He was an attendee at the conference.
3. She was an attendee at the wedding.
4. The attendee were asked to sign in.
5. The attendees were given name tags.