I suppose that using something like PostHistoryType.Id=2 and PostType.id=5 you could find a list of tag-wikis you have created.
Try for example here for a somewhat similar query (although that query was designed for answers and questions, so the results do not look that fine for tag-wikis. There is definitely a space for improvement; perhaps there already is a query for this.)
Many users create also tag-wiki, when they create a tag. If you did so, then this should be a subset of the list of tags you have created.
Of course, this is not the same thing as what you wanted, but it might be some approximation (at least in some cases.)
One of the answers in the post linked in Arthur Fischer's posts mentions this query:
The tags where the oldest question with this tag was created by given user. It can also be considered as approximation of the list of tags created by a user.
You can find at least one tag you have created - namely the one for which you have obtained taxonomist badge.