The following macro will list all names (because there can be more than one) that are the same position and size as the selected range (I haven't tested it on non-contiguous ranges).
If a name is sheet-scoped (as yours is) it appears with the sheet name as prefix.
Code:
Sub isdefinename()
Dim msg As String, n, zz
For Each n In Names
Set zz = Nothing
On Error Resume Next
Set zz = n.RefersToRange
On Error GoTo 0
If Not zz Is Nothing Then
If zz.Address(external:=True) = Selection.Address(external:=True) Then
If msg = "" Then msg = n.Name Else msg = msg & vbLf & n.Name
End If
End If
Next n
If msg = "" Then msg = "Selection is not a Name"
MsgBox msg
End Sub