Nomad is the word you are looking for.
By 'they' I assume you mean people. Yes, millions of people around the world live in deserts, including the author of this answer.
Millions of people around the world live in cities and towns located in deserts.
A map.
People of all races live in the deserts around the world.
Millions of people live in cities and towns in deserts around the world and they have a variety of occupations, much the same as cities not located in deserts.
There are millions of people around the world who live in cities and towns in deserts.
Millions of people around the world survive everyday in the deserts. Look at cities such as Cairo in Egypt or Las Vegas, Phoenix and Tucson in the United States as examples. These are cities located in deserts and people survive quite well. There are many more examples.
Yes, people have a variety of occupations in the deserts.
Hundreds of millions of people around the world live in cities and towns in deserts.
Near the 1600s ------ They would have had to travel through deserts to leave Africa, so somewhere around 50,000 years ago.
The majority (millions) of people who live in deserts live in major cities where they can easily purchase pork or beef. Only those who live in isolated areas with no power would not have access to these foods as there are no stores or refrigeration to store them without spoilage.
John Winthrop was the leader of the people who were settling in Boston. The group of people who settled in Boston were called the Puritans.