1  Effie G. MACDIARMID (1887 – 1976)
   +  William Howard LUMMIS (1889 – 1967)
      2  Wallace LUMMIS (1921 – 1983 Princeton Junction, New Jersey, USA)
         +  Una M. BOYLE (1923 – 2000 Princeton Junction, New Jersey, USA)
            3  Wendy LUMMIS ( – living)
            3  Malcolm LUMMIS ( – living)
            3  Anne LUMMIS (1955 – 1996)