FitSugar had the 411 on Olympian Kerri Walsh's newest bundle of joy! The second time mom and her husband Casey Jennings welcomed the babe on Wednesday night. While the couple went traditional with their first child's name — Joseph Michael, they decided on the very unique Sundance for this infant. Ben Affleck and Jennifer Garner took a similar approach to naming their daughters — they selected the once trendy Violet for their first girl and the less common Seraphina for her baby sis! This pattern even happens with television characters. On Parenthood, the Braverman boys are named Adam and Crosby. Do you like when parents mix popular names with alternative ones among siblings?