A family tree is a diagram(表格) of the people in a family. This is the Wilson family tree.
All the members of the Wilson family are on the tree.
Betty and Henry are the parents of Sally, Linda and Tom. Linda is single(单身). Sally is married. Her husband's name is Jack. Sally and Jack are the parents of Jimmy and Sarah. Jimmy is their son, and Sarah is their daughter.
Tom is also married. His wife's name is Patty. Patty and Tom are the parents of Julie and Kevin. Julie is their daughter, and Kevin is their son.
Jimmy, Sarah, Julie, and Kevin are cousins. They are also the grandchildren of Betty and Henry.
