Sunter timelines
1864: Robert Sunter marries Janet PEDDIE, Dundee
1874: Robina Douglas Sunter, mmn Peddie, born, Dundee
1878: Robina Douglas Sunter, mmn Peddie, dies, Dundee
1876: Alexander Watson Sunter, mmn Peddie, born, Dundee
1886: Robert Peddie (16), mmn Peddie, dies, Dundee
1896: Janet Peddie or Sunter (55), mmn HARRIS, dies, Dundee
1898: Alexander Sunter marries Margaret MORRIS, Dundee
1899: Robert Sunter (60), mmn CHRISTIE, dies, Dundee
1900: Annie Tarbert Sunter, mmn Morris, born, Dundee
1902: Janet Peddie Sunter , mmn Morris, born, Dundee
1904: Margaret Morris Sunter , mmn Morris born, Dundee
1907: Agnes Larg Muir Sunter, mmn Morris, born, Dundee
1911: Agnes Laig Murr*, mmn Morris, dies, Dundee
1911 Alexander Thomson Sunter, mmn Morris, born, Aberdour
1913: Robert Sunter, mmn Morris, born, Dalgetty
1933: Alexander Thomson Sunter marries Christina Bruce LUNN, Dundee
1933: Margaret Sunter marries James Kirk SINCLAIR, Dundee
1934: Janet Peddie Sunter marries William TOSH, Dundee
1949: Alexander Sunter (73) dies, Dundee
1999: Alexander Thomson Sunter, mmn Morris, dies, Dundee
1841 Census: Abbotshall
Elizabeth Sunter, 35
Janet Sunter, 10
William Sunter, 5
Elizabeth Sunter, 3
Robert Sunter, 1
1851 Census: Abbotshall
Elizabeth Sunter, 47
Elizabeth Sunter, 14
Robert Sunter, 11
1881 Census: Dundee
Robert Sunter, 41
Janet Sunter, 45
Robert Sunter, 11
Alexander Sunter, 5
1911 Census index, Dundee:
Alexander Watson Sunter, 35
Margaret Morris Sunter, 34
Annie Tarbert Sunter, 11
Janet Peddie Sunter, 8
Maggie Morris Sunter, 6
Agnes Laig Murr* Sunter, 4
Alexr Thomas Sunter, 0
You could try looking for marriages of Penmans to any of those wives' surnames and see where it takes you.