Tabloids buzzed when Coco Arquette, the daughter of actors David Arquette and Courteney Cox, made her much-anticipated debut five years ago. Excited fans chatted as much about the baby's unique name as they did about the baby. For everyone who attributed the cute moniker to fashion icon Coco Chanel, we were wrong. Last night on Lopez Tonight, daddy David said, "It's sort of an abbreviation of 'COurtney COx' . . . 'CoCo'."