WPF TreeView Group By

I have class "Person" that look like this:

public class Person
{
        public string Name { get; set; }
        public int Age { get; set; }
        public string Country{ get; set; }
        public List<Person> Children { get; set; }
}

I want to create a TreeView in WPF that will present the Persons by Country.

For example:

• New york
  • Bob
    • New York
      • Ethan
      • Owen
    • Canada
      • Benjamin
      • James
  • Kevin
    • Paris
      • Louis
  • William
• Finland
  • Oliver
    • Hungary
      • Ben
      • Paul
    • Iceland
      • Arthur
        • Benjamin
    • England
      • Gabriel
      • Victor
  • Eino
    • Paris
      • Gabriel
      • Adam
  • Emma

My TreeView :

 <TreeView.Resources>
  <HierarchicalDataTemplate ItemsSource="{Binding People}" DataType="{x:Type Person}">
       <Label Content="{Binding Name}"></Label>
   </HierarchicalDataTemplate>

Is there someway to use "Group by" in tree view?