All the articles are described as "about women" by ODNB themselves. James Barry is generally considered a woman, her motivation for assuming male identity is presumed to be the desire to practice medicine. Women historically have passed as men to join male-exclusive professions, though one might imagine the successes were usually undocumented.
The red crosses are to be be used as the items are found, confirmed to be the same person, and the information from the ODNB article is used in the Wikipedia article. Clearly this is something where the OBIN will be fantastically useful for.
The forename, name, nickname, married name, etc. fields are for the template to construct whatever alternative article names or redirects are needed. Human names are complex, those of the British upper classes, doubly so, though at least they use mainly the basic Latin alphabet.
The list is sufficiently long that it would need to be split, presumably by letter, to avoid exceeding the transclude limits.
Thanks for your many and various comments, I hope that covers the queries.
Richard.