┌─William Pantulf ⇒
┌─Robert Pantulf
│ └─Lescelina
┌─Ivo Pantulf
┌─Hugh Pantulf
William Pantulf
│ ┌─Flaad
│ ┌─Alan fitz Flaad
│ ┌─William Fitz Alan
└─Christina Fitz Alan
└─Christiana