Mark is Jack’s...
father
Jack is John's ...
nephew
John is Mark's ....
brother
Jack is Lucy’s...
brother
Sara is Mark's ...
niece
Lucy’s is Jack’s...
sister
Margaret is Sara’s ...
grandmother
Ronald and Margaret are Sara, Lucy and Jack's ......
granparents
Elizabeth is Lucy’s ...
aunt
Ronald is Lucy’s...
Grandfather
Sara is John's ....
daughter
Elizabeth is John's ....
wife
Mark is Susan's...
husband
Susan is Jack’s ...
mother
Lucy is Ronald's ...
granddaughter
Jack is Margret's .....
grandson
John is Sara’s ....
father
Sara is Jack’s ...
cousin
Margaret is Susan's ....
mother-in-law
Mark is Sara’s...
uncle
Ronald is Elizabeth's ....
father-in-law