Combobox populated with a list populated from another file

Good morning
I am trying to populate a ComboBox with a list of names that is contained in another, unlinked, workbook called Busstops.xlsm in a range named "Stopnames" can some one please help.

Option Explicit
Private Sub ComboBox1_Click()
' Select option and place value into the selected cell

Selection = ComboBox1.Value

Unload Form_Select_Stop

End Sub
Private Sub UserForm_Initialize()
'Fill the listbox

    With ComboBox1
        .AddItem "hello"
        .AddItem "Bye"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        .AddItem "three"
        
    End With
End Sub