John J. “Jack” Dilworth Jr., Of Medford January 20, 2008. Husband of Kathy (Knowlton). Devoted father of Melissa Dilworth of Maine, Jonathan Dilworth and Lindsi Dilworth both of New Hampshire. Loving grandfather of Niko and Marianna. Cherished son of Madeline (Pacheco) of Medford and the late John J. Dilworth. Loving brother of Kathleen Mariano of Dunstable, Carol Duffy, Joseph and Steven Dilworth all of Medford. Relatives and friends are respectfully invited to visit with the family on Thursday from 3-9 at the Dello Russo Funeral Home, 306 Main St. Medford. Funeral service and interment are private. In lieu of flowers memorial contributions may be sent in John’s name to the American Heart Association, 20 Speen St., Framingham, MA 01701.