Jefferson family

The Jefferson Family is a wealthy family in Greg's neighbourhood,despite being one of the main character Rowley's family,very less is known about this family,the only known extended family Members are Grandpa Jefferson and Rowley's Cousins.

Known Members
             Nuclear Family            Extended Family
 * Linda Jefferson-Mother of Rowley,Wife of Robert
 * Robert Jefferson-Father of Rowley,Husband of Linda
 * Rowley Jefferson-Only Child
 * Grandpa Jefferson-Robert's Father
 * Rowley's Cousins-The cousins of Rowley, the newphews of Linda or Robert.

Appearances
Notice: The appearances are counted only if all the members of at least the nuclear family have appeared.
 * Diary of a Wimpy Kid Online (first appearance)
 * Diary of a Wimpy Kid
 * Diary of a Wimpy Kid: Rodrick Rules
 * Diary of a Wimpy Kid: Dog Days
 * Diary of a Wimpy Kid: Cabin Fever
 * Diary of a Wimpy Kid (film)
 * Diary of a Wimpy Kid: Dog Days (film)

Trivia

 * Out of the family,only Rowley Jefferson and his father only appeared in all the books.