Currently my view has the need to receive a List containing information from two different models.

Something like this

public class ViewModel
{
    [JsonProperty("")]
    public List<Unknown> viewModelList;
}

This Unknown type would have information from two different models, like so.

public class FirstModel
{
    int w;
    int x;
}

public class SecondModel
{
    int y;
    int z;
}

public class Unknown //Model or ViewModel?
{
    [JsonProperty("")]
    int w; //From FirstModel

    [JsonProperty("")]
    int x; //From SecondModel
}

My question is, this Unknown type would have to be a Model? My idea of a Model is that they represent Business entities or Database entities, and ViewModel are abstractions of those models. In this case, Unknown is nothing, but an abstraction of both FirstModel and SecondModel, so I think it characterizes more as a ViewModel, than a Model, but then if I treat it as a ViewModel, I'm unable to make a List out of it, because otherwise my code would be as follows

public class ViewModel
{
    [JsonProperty("")]
    public List<UnknownViewModel> viewModelList;
}

It would be a ViewModel inside a ViewModel, and I don't know if this is common or good practice.