Source: Tome of Magic
Truenames are notoriously difficult to pronounce, but yours is harder than most.
Benefit: The DC to speak your personal truename increases by 4 (this stacks with the +2 bonus that normally applies to a DC to speak a personal truename). Your normal truename - the one a truenamer would use if he didn't know your personal truename - is unaffected by this feat. In addition, those attempting to research your personal truename find doing so much more difficult. The DC of any check made to research your personal truename increases by 4.
Normal: The Truespeak DC to say a personal truename is 15 + (2 x CR) + 2.