Four or more generations of descendants of Alfred Blackman (1862-1953) if they are properly linked:
1. Alfred Blackman (1862-1953)
- 2. Irwin Oxley Blackman (1894-1950)
- 2. Doreen Ruby Sloggett Blackman (1897-1958)
- 3. Dorothy Jean Black (?-?)
- 3. John Black (?-?)
- 3. Robert Harley Black (?-?)
- 3. Douglas Harley Black (?-?)
- 2. Irene Thelma Blackman (1899-1978)
- 2. Hilton Harley McLennan Blackman (1901-1979)
- 3. Harley Blackman (1932-2005)
- 3. Patsy Blackman (1934-?)
- 3. Robin Blackman (1944-?)
- 3. Ross Blackman (1947-?)
- 2. Wilfred Ainsworth Blackman (1904-?)
- 2. Dulcie Monica Blackman (1908-1965)