[ 祖先 of Robert Guy Clarkson] [up to] Sarah Williams
[generation] 1
1 -
Robert Guy Clarkson
[generation] 2
3 -
Kathleen Eleanor Burk
[generation] 3
6 -
Daniel Francis Burk
1849-1917
[generation] 4
12 -
William Knowles Burk
1816-1881
[generation] 5
24 -
David F. Burk
[generation] 6
49 -
Sarah Williams
1763