KENNEDY, DENNIS F., 34, of 1333 55th Ave. N, St. Petersburg,died Friday (Oct. 23, 1987). Born in New York City, he came here in 1963 from Staten Island, N.Y. He was operations director for a real estate firm. He was a Catholic. Survivors include his wife, Elizabeth E.; a son, Thomas K., St. Petersburg; a daughter, Alison M., Newport, R.I.; his mother, Maryann Kennedy, St. Petersburg, and a sister, Chrisan Folker, Indian Rocks Beach. Alan R. McLeod Funeral Directors, St. Petersburg.