Prism Command Binding using Parameter?

Here is a complete solution that worked for me:

1. Use CommandParameter (as per Dmitry - Spasiba!)

   <TextBlock>
       <Hyperlink CommandParameter="{Binding PersonSelected.PersonKnown2ID}"
                  Command="{Binding NavHomeViewCommand}" >
           <Run Text="{Binding PersonSelected.PersonKnownName2}" />
       </Hyperlink>
   </TextBlock>
   

2. Change DelegateCommand to use object parameter

   navHomeViewCommand = new DelegateCommand<object>(NavHomeView);
   

3. Command Properties remain unchanged but method changed to use parameter:

   private readonly ICommand navHomeViewCommand;
   public ICommand NavHomeViewCommand
   {
       get { return navHomeViewCommand; }
   }
   
   private void NavHomeView(object ID)
   {
       int val = Convert.ToInt32(ID);
       var parameters = new NavigationParameters();
       parameters.Add("To", val);
      _regionManager.RequestNavigate("MainRegion", new Uri("HomeView", UriKind.Relative), parameters);
   }
   

You can use 'CommandParameter' property of the Hyperlink.

 <Hyperlink Command="{Binding NavHomeViewCommand}" CommandParameter="1" >
       <Run Text="{Binding PersonSelected.PersonKnownName}" />
 </Hyperlink>