Unique traits?

[Makanyane]

I'm trying to get some unique attributes to apply to the first child of a faction to come of age.. this includes the requirement to have a unique epithet and various unique ancillaries and or traits.

I can make the ancilliaries work as unique - whilst he's alive by using the:
and not WorldwideAncillaryExists
line in the ancillary trigger, but I can't work out how to either

A. get the ancillary to give the epithet, or

B. get a trait trigger to use the and not Worldwide.. function
it ignores and generates exit error message if I use 'and not WorldwideAncillaryExists' and just ignores it for any way I can think of writing it for WorldwideTrait etc. !

Has anyone tried anything like this, advice appreciated!