diff --git a/gramps/gui/widgets/fanchart.py b/gramps/gui/widgets/fanchart.py
index 8b822e0d6..e63a223a1 100644
--- a/gramps/gui/widgets/fanchart.py
+++ b/gramps/gui/widgets/fanchart.py
@@ -93,6 +93,11 @@ from gramps.gen.const import (
 _ = glocale.translation.gettext
 from ..utilscairo import warpPath
 
+# following are used in name_displayer format def
+# (must not conflict with standard defs)
+TWO_LINE_FORMAT_1 = 100
+TWO_LINE_FORMAT_2 = 101
+
 #-------------------------------------------------------------------------
 #
 # FanChartBaseWidget
@@ -120,8 +125,12 @@ class FanChartBaseWidget(Gtk.DrawingArea):
         self.last_x, self.last_y = None, None
         self.fontdescr = "Sans"
         self.fontsize = 8
-        self.twolineformat_nums=(name_displayer.add_name_format('fanchart_name_line1', '%l'),
-                                 name_displayer.add_name_format('fanchart_name_line2', '%f %s'))
+        # add parts of a two line name format to the displayer.  We add them
+        # as standard names, but set them inactive so they don't show up in
+        # name editor or selector.
+        name_displayer.set_name_format(
+            [(TWO_LINE_FORMAT_1, 'fanchart_name_line1', '%l', False),
+             (TWO_LINE_FORMAT_2, 'fanchart_name_line2', '%f %s', False)])
         self.connect("button_release_event", self.on_mouse_up)
         self.connect("motion_notify_event", self.on_mouse_move)
         self.connect("button-press-event", self.on_mouse_down)
@@ -171,10 +180,6 @@ class FanChartBaseWidget(Gtk.DrawingArea):
         self.reset()
         self.set_size_request(120, 120)
 
-    def __del__(self):
-        for num in self.twolineformat_nums:
-            name_displayer.del_name_format(num)
-
     def reset(self):
         """
         Reset the fan chart. This should trigger computation of all data
@@ -578,8 +583,8 @@ class FanChartBaseWidget(Gtk.DrawingArea):
                        fontcolor, bold)
         else:
             text=name_displayer.display(person)
-            text_line1=name_displayer.display_format(person,self.twolineformat_nums[0])
-            text_line2=name_displayer.display_format(person,self.twolineformat_nums[1])
+            text_line1=name_displayer.display_format(person, TWO_LINE_FORMAT_1)
+            text_line2=name_displayer.display_format(person, TWO_LINE_FORMAT_2)
             if draw_radial:
                 split_frac_line1=0.5
                 flipped = can_flip and ((math.degrees((start+stop)/2.0) + self.rotate_value - 90) % 360 < 179 and self.flipupsidedownname)