Onomancy (haplological for Onomamancy or Onomatomancy) is divination based on a subject`s given name, popular in the Late Middle Ages, usually following practices of Gematria. ... Found on http://en.wikipedia.org/wiki/Onomancy
On'o·man`cy noun [ Greek ... name + -mancy . Confer Nomancy .] Divination by the letters of a name; nomancy. [ R.] Camden. Found on http://www.encyclo.co.uk/webster/O/20