The problem with a name like Jennifer is that it is not a root name but a duriviative. Jennifer comes from the welsh Gwenhwyfar or Guinevere. There does seam to be a St Guinevere but I cannot find any biographical information.
Well, now, she'll just have to be born on a St. Margaret's day, since that is her name (even if we have to wait many more years before we have a girl). Hmmm, Lawdog - I wonder how DH would react to that, if it was a boy?