Janet and James Cappe, a girl, Claire Bess, Dec. 3, AMI Tarzana Regional Medical Center. Mother is non-pro; father’s a screenwriter.Leslie Vanderveer-Keneipp and David M. Keneipp, a girl, Sarah Nicole Keneipp, Dec. 15, Cedars-Sinai Medical Center. Mother’s a paralegal at Loeb & Loeb; father’s VP, business-legal affairs, Fox Television Stations Inc. * Alison and Pete Weber, a girl, Anna Hunter Weber, Dec. 19, Northwestern Hospital, Chicago. Mother’s director of marketing for the Levy-Restaurants/DIVE!; father’s controller for same.