J. Matthew and Andrea Pfeiffer of Oswego, Ill., are parents of a 9-pound, 6-ounce daughter, Audrey Nicole, born July 15 at Central DuPage Hospital, Winfield, Ill. Grandparents are Rob and Carol Baker of Flora and Jim and Yem Pfeiffer of Rolling Meadows, Ill. Maternal great-grandparents are Carl and Millie Baker of Flora. Paternal great-grandmother is Maxine Pfeiffer of Columbus.