Anna is Peter and Julia's
daughter
Agatha is Anna and Lucy's ...
grandmother
Julia is Paul's ...
sister
Peter is Mark's ....
uncle
Julia is Mark, David and Lucy's ...
aunt
David is Rose and Peter's ...
son
Mark is David's ...
brother
John is Mark, David and Tom's ...
grandfather
John is Julia and Paul's ...
father
Agatha is Paul and Julia's ...
mother
Lucy is Tom and Anna's ...
cousin