[to the [nth (generation)] generation]
0━┳
Gordon Walter McDonald &ca 1966 Susan Winnifred Scutt ca 1944
┣━1──
Barbara Gwen McDonald & Ronald Elgin Springgway
┣━2──
Sheila Joy McDonald & Ronald Wayne Byers
┗━3━━
Donald Gordon McDonald & Deborah Stephens
[total][:] 3 后代 (8 [persons] [with] [spouses])