Four or more generations of descendants of Adelaide Mary Blackman (1856-1906) if they are properly linked:
1. Adelaide Mary Blackman (1856-1906)
- 2. George Alexander Lawson (1877-1892)
- 2. Georgina Estelle Lawson (1879-1969)
- 2. Royden Thomas Lawson (1882-)
- 2. Pauline Adelaide Grace Lawson (1884-1957)
- 2. Clara A Lawson (1886-1894)
- 2. Helena Heather Lawson (1895-1964)