A nickname for the more popular John (well, actually, it’s a shortened version of the medieval Jackin or Jankin, which were diminutives for John), Jack is climbing in popularity, mirroring its rise at the beginning of the last century. It first peaked at number 14 in ’29 and ’30, then dipped to a low of 179 in ’89. It’s now back in the top 40, and should stick around for a while -- parents like the comfortable, classic, happy, and fresh sound of the name. Despite its frequent appearance in fairy tales and nursery rhymes (Jack Sprat…Little Jack Horner…Jack and the Beanstalk…etc.), Jack also has managed to retain a slightly edgy feel.