up to the 12th generation
0─┬
Sonie Markham 1939-2016 & Ernest Rodker 1937
├─1━┳
Oliver Rodker 1969 & Jennifer Nelson
│ ┣━1━━
Isaac Lea Rodker 2015
│ ┗━2──
Rosa Rodker 2019
└─2━━
Joel Rodker 1976
Total: 4 descendants (7 individuals with spouses)