Four or more generations of descendants of Grace Isabella Elvins (1889-1980) if they are properly linked:
1. Grace Isabella Elvins (1889-1980)
- 2. Doris Gwendolin Cramp (1908-1908)
- 2. Eric Gordon Cramp (1910-1994)
- 3. Margaret Yvonne Cramp (1939-)
- 3. Allan James Cramp (1944-1987)
- 3. William Rex Cramp (1946-)
- 2. Gladys Leila Cramp (1912-2001)
- 3. Reginald Francis O'Brien (1929-)
- 3. Doreen Patricia O'Brien (1931-)
- 3. Joan O'Brien (1933-)
- 3. John Dennis O'Brien (1946-)
- 3. Denis O'Brien (1948-)
- 3. Annette Isobel O'Brien (1950-1971)
- 2. Clifford James Cramp (1915-1976)
- 3. Robert William Cramp (1940-)
- 3. Laurel Miriam Cramp (living)
- 2. Thomas Reginald Cramp (1917-1997)
- 3. Douglas Cramp (1946-)
- 3. Wendy Cramp (1948-)
- 3. Phillip Cramp (1950-)
- 3. Graeme Cramp (1951-)
- 2. Hilda Daphne Cramp (1920-1954)
- 2. Laura May Cramp (1922-2003)
- 2. Myra Jean Cramp (1925-)
- 2. Mavis Irene Cramp (bef1946)
- 2. Phyllis Doreen Cramp (c1930-)