Good Charlotte frontman Joel Madden and partner Nicole Richie welcomed their second child into the world yesterday (September 9).Sparrow James Midnight Madden was born weighing in at 7lb, 14 ounces. Both mother and baby are reportedly doing well.The couple already have one child, one year old Harlow Winter Kate Richie Madden. K! sends our congratulations to the family!Joel Madden isn't the first rock star to give his children unusual names. Pete Wentz has a son called Bronx Mowgli Wentz, My Chemical Romance frontman Gerard Way and Mindless Self Indulgence bassist Lyn-Z have a daughter called Bandit Lee Way and Korn frontman Jonathan Davis has two sons one called Pirate Houseman Davis and the other is called Zeppelin Houseman Davis.If you were a rock star, what unusual names would you give to your children?