* A band: There are several bands called "Los Inquietos" across Latin America, for example, a Colombian cumbia group from Barranquilla.
* A group of people: It could be used to describe a group of restless or energetic individuals.
* A literary or film title: It might be the title of a book, movie, or play.
To know exactly who "Los Inquietos" refers to, you need more context. Could you tell me where you encountered this term?