Méjico vs. Mexico

I have noticed that some members of the group spell México with a J, ie. Méjico.

For exmaple in Daniel's message from about a year ago he wrote:

Once you reach Manuel's grandfather who ever he may have been you will connecto to all of us in someway, youll go back so far in your genealogy 1500-1600, and given the right line back to the Kings of Spain and princes of Europe, I connect to royalty thanks to my Spanish, Portuguese and German ancestry. Its a good feeling knowing where you come from but the best is for the perservation for future generations. Since you have alteño ancestors, you're full spanish i suppose, until we can get further possibly italian, portugues, french and others who arrived in Méjico. -Daniel

I was just wondering about the politics/tradition/meaning behind the use of such a spelling and would appreciate any comments.