Correct title should be: Blob, de
I will admit that I am unaware of what this title re-arrangement method is called, but while I am aware of how it works for English titles, I am unaware of how it is used with other languages. Remember that we did not invent this naming method. Currently all titles with an article as the first word is moved to the end. This includes German, Dutch, French etc. The exception in French is the contraction title, example: L' which does not get moved.
If any of you in other countries can find reference material on how these sorting systems are used per language, it would be helpful. We'd rather use an official method instead of trying to match other languages to fit into the English based model aka making it up as we go.
The entire naming situation could be handled with code on the site, where lists are sorted by automatically ignoring articles in strings where applicable. In such a scenario, we wouldn't need to re-arrange articles in titles at all.