Jaqen

In Game of Thrones, Jaqen H'ghar is the name used by the Faceless Man who trains Arya in the lethal ways of the House of Black and White. The character is endlessly mysterious, but Jaqen seems not to be his given name. Still, with the myriad offshots of Jackson -- Jaxon, Jaxsen, et al -- soaring in popularity, Jaqen may have some potential on this side of the screen and page.

Pronounced JAH-ken.