Jeff Sanchez

Jeffrey "Jeff" Sanchez is a deutaragonist in Rick and Morty. He's the only son of Rick Sanchez and Mrs. Sanchez, brother of Beth Smith, brother-in-law of Jerry Smith, grandson of Rick's Father and unknown woman, uncle of Morty Smith and Summer Smith, and great-uncle of Morty, Jr.

Biography
He often takes part in Rick and Morty's adventures, being a part-time scientist. In "Rick Potion #9", he, along with his father and nephew escape their original dimension and start living in a replacement dimension. Starting with season 3, Jeff starts to be more like his father: starts drinking and burping a lot because of it.