JEWEL: From the Old French, a "priceless gem." If you are undecided about whether to name your child Pearl, Opal, or Jade, why not go to the source? Relatives: Jewell, Jewelle, Bijoux.
JOACHIM: From the Hebrew for "God will judge." Relatives: Joaquin, Akim. Namesakes: Joaquin Andujar, San Joaquin Valley.
JOCELYN: Old English for "just one." Chiefly a boy's name until this century. Too rarely heard these days. Relatives: Jocelyne, Joceline, Joscelyne, Joseceline, Joscelin, Joslyn, Joslin, Josalin, Jossie, Jocie, Justine, Justina, Justa.
JODY: A variation of Joseph. This choice would serve a girl or boy well. Relative: Jodie. Namesakes: Jody Powell, Jodie Foster.
JOEL: Hebrew for "the Lord is God." Joel and the variations work well for either sex. Although popular, Joel has never been overused. Relatives: Yohel, Joelle, Joella, Joellen, Joela, Jolson. Namesakes: Joel Grey, Billy Joel.
JOHN: From the Hebrew for "God's grace." Whereas the expression was once "every Tom, Dick, and Harry," the more likely choice would be "every John, Bill, and Mike," at least in recent decades. The Celtic variations (such as Ian and Sean) have become especially popular in recent years. Relatives: Jon Johnny, Johnnie, Jack Jock, Jocko, Johann, Johan, Jean, Jan, Jenner, Janos, Jovan, Juan, Johannes, Johnson, Jansen, Janson, Jones, Jackson Jenkins, Hanson, Hansen, Jonnel, Hans, Ivan, Ian, Iaian, Eoin, Sean, Shawn, Shane, Seain, Zane. Namesakes: Saint John, John F. Kennedy, John Glenn, Johnny Carson, Johann Sebastian Bach, Johann Strauss, Jack London, Jackson Pollock, Ivan Lendl, Ian Fleming, Jill St. John, Zane Grey, Jean-Luc Godard.