Robert Jefferson

Robert Jefferson is father of Rowley Jefferson, and the husband of Ms. Jefferson. He is one of the wealthiest people in Greg's neighborhood, as well as the least respected in his neighborhood. In the Movie, he is played by Alf Humphreys. In Dog Days, Robert takes a close interest in sports, such as Tennis and Golf.

Personality
He is more shrill than Frank Heffley, and he is far more temperamental, rude, irritable, paranoid, disiplinary, strict and over-reactive. He won't let Rowley play any video games with violence or fighting in it. He sees Greg as a bad influence for several reasons. One is Greg's haunted house idea, insulting him by calling him a woman on dinner while trying a secret language, and mocking his father on his birthday. He is extremely rude, as seen in Diary of a Wimpy Kid: Dog Days, where he banishes Greg out of the country club for several complaints about the quality of service, and how they can be improved. He has a close bond with Rowley.

Rowley Jefferson
Overall, Rowley and Robert have a close relationship. They enjoy playing Tennis together.