LOS ANGELES—President Joe Biden added a new title on Wednesday: great-grandfather. His granddaughter, Naomi Biden Neal, gave birth to her first child, a boy, with husband Peter Neal at Cedars-Sinai Medical Center in Los Angeles. The baby’s name is William Brannon Neal IV, according to an Instagram post from Jill Biden, the first lady, of her and the president with their new great-grandson. Biden, who was in Los Angeles and saw the baby at the hospital, announced the birth at the end of an official briefing on wildfires in Southern California. “The good news is I’m a great-grandfather as of today,” Biden said….