ambigram (noun): A typographical design or artform that may be read as one or more words, not only as presented, but also from another viewpoint, direction or orientation.
I really rather like this one — a simple rotational design which achieves some interesting and coherent typography. And look! I don’t just do names. Thirteen is an actual noun… although, strictly, are numbers nouns in a grammatical sense?
Anyway, it’s a fun design. The Th/en ligature is interesting and new (and also creates an initial capital letter, which is always a boon), and the two matching ‘e’s are particularly pleasing.
What you see here is a rather rough-and-ready version, a Photoshopped scan of a pen-drawn sketch. I cleaned up one half of a small sketch, adjusted a few of the stroke widths and then copied the edited half, flipped it round and put the two halves together to create the complete design.
The next step would usually be to create a vector-drawn version by tracing over this image on the computer. The trouble is that this process will likely remove some of the welcome informality of the pen strokes (clearly visible in this image), and it would be a shame to lose that, I think.