How do I list the honorary titles that I've granted?

Solution 1:

The feature to list honorary titles has now been implemented. To list the titles, go to your Council and click Minor Titles:

Previous answer which applies to older versions of the game

After playing the game for a few months, and also downloaded most of the DLCs, I think I now can answer my own question.

No, it is not possible to list the honorary titles that have been granted.

The reason I asked this from the beginning is because I want to keep my vassals happy to maximise income and armies.

What I tend to do is browse through my vassals every now and then and:

• If they just slightly dislike me, grant an honorary title if available.
• If the person hates me, I tend to plot to kill him/her.
• Perform other actions to increase the relationship (sending gifts, granting titles, etc)