Probably no need to leave this open.

Reopen.

I am in the process of drafting an issue topic on expanding the number of "person" entries in JMdict, which may well lead to this entry including mention of Florence Nightingale. I'm adding and approving it as a test. I'll approve and reopen.

@@ -19 +19,6 @@
-<gloss>nightingale</gloss>
+<gloss>nightingale (Luscinia megarhynchos)</gloss>
+</sense>
+<sense>
+<pos>&n;</pos>
+<misc>&person;</misc>
+<gloss>Nightingale, Florence (1820-1910)</gloss>

OK, but do you really think that for example Louis Pasteur (bolded), David Hilbert (bolded) are more commonly referred to in Japanese 
mainstream discourse, better known to a large amount of people, than Florence Nightingale? Or even Richard Wagner,  Moliere, Alan Turing, 
Immanuel Kant, John Locke? I'm pretty sure they're not. I think you can hit up a random 15-y-o on the street and the name they'd be the 
best-acquainted list of those + Nightingale, would be Nightingale. I actually added her name here because I heard a nurse say "ナイチンゲー
ル精神じゃないけど・・・" in a TV interview. (I think it was -精神, not 100% sure)
The Wikipedia list seems to focus on people who were the most IMPORTANT in their respective fields rather than people who are well-known 
and frequently referenced to. Maybe that's a key difference between an encyclopedia trying to assign importance to different topics, while 
a dictionary is merely trying to describe a language as it's used? I think it would make more sense to make frequency of reference rather 
than "importance" the guiding principle here.

https://meta.wikimedia.org/wiki/List_of_articles_every_Wikipedia_should_have#Biography

We currently only have a handful of person entries in JMdict. Unless we want to significantly expand their number, I don't think Florence Nightingale quite makes the grade at this moment in time.
I note that she isn't included in the biography section of Wikipedia's "List of articles every Wikipedia should have", which could possibly serve as a guide for deciding which people should have an entry in JMdict. There are about 60 "top-priority" people on that page (marked in bold).