NAOMI Watts has named her newborn son Samuel Kai. The 40-year-old actress - who welcomed the baby, who weighed a healthy 7lb 13oz, into the world on Saturday - chose the name with the help of her husband Liev Schreiber, the couple's representative revealed. The spokesman added: "Both mom and baby are doing great." Naomi and Liev already have 16-month-old son Alexander. Motherhood seems to agree with the Australian actress, who excitedly said of her eldest child: "He's turning pages in the book. He's crawling and standing up. I read 'Goodnight Moon' to him every night." " Expo