Part I: Weimar Republik
Part II: Third Reich
This site is the most comprehensive on the web devoted to trans history and biography. Well over 1400 persons worthy of note, both famous and obscure, are discussed in detail, and many more are mentioned in passing.
There is a detailed Index arranged by vocation, doctor, activist group etc. There is also a Place Index arranged by City etc. This is still evolving.
In addition to this most articles have one or more labels at the bottom. Click one to go to similar persons. There is a full list of labels at the bottom of the right-hand sidebar. There is also a search box at the top left. Enjoy exploring!