yes there is. in fact, my name is Shaumozza Desra Hendrarso. no lie. if you don't believe, check it on Google and type in that name
They'd be called that person's relative.
That person may be called a victim. If the person does not survive, the person can be called a casualty.
a person who does not exercise is called a layman.
The person is called an archaeologist
The person is called the loser.
A person is called an "Olympian" when they are in the Olympics.
A person in a story is called a character.
the person is called a chaufer
that person is called an astronaut
A person from Iraq is called an Iraqi.
A person from Zimbabwe is called a Zimbabwean.
A person from Cameroon is called a Cameroonian.