Where is the translation of "Dona Dona" from? In episode 16, what appears to be a Japanese translation of "Dona Dona" plays twice -- once where Nanami has a dream where she, like the calf in the song, is sent away to her death, and once right after Utena removes the cowbell.

I know that there are translations of this song (which seems to originally have been in Yiddish) -- there's a recording of Joan Baez singing it in English on YouTube, and Wikipedia lists a bunch of other languages.

Given that I doubt Japan has a particularly large Jewish presence compared to the other countries indicated by the languages listed on Wikipedia, I'm wondering about the Japanese translation: who did the translation, and when did a translated version of the song first appear? Did a translation exist before Utena?
Somewhat belatedly, from the research I did for the blog post you mention, this is what I understand the sequence of events to be:


Song is written in Yiddish, fails to gain mainstream popularity even when the songwriter produces an English version, sinks into obscurity.
Teddi Schwartz and Arthur Kevess dig it up in the 1950s and translate it into English; this version gains moderate popularity in the United States.
In the 1960s, Joan Baez and some other mainstream popular artists record versions. It becomes very popular in the United States, and translated versions start popping up in other countries, including Japan.
The original Japanese translation, as you note, is by the Peanuts and may have played a role in popularizing the song there, but their version becomes pretty thoroughly overshadowed by the 1966 Yasui Kazumi translation, which passes into the general cultural consciousness. For some reason it remains one of those bits of common knowledge/things you can reference and expect pretty much everyone to understand in Japan even when that's no longer the case in its home country. (At least, I grew up listening to folk music and had not actually heard the song before Utena.)
Some thirty years later, when planning the cow episode, one of the creators of Utena remarks that it seems like a "Dona Dona" kind of situation. (This is from a translated interview that I don't remember where I found, sorry.) Everyone else goes "hey, that's a good idea, actually," and they decide to use the song (with the well-known 1966 translation) in the show. (They probably didn't sit down and go "Hmm, which translation should we use? Or should we do our own?" and eventually settle on that one; as far as I understand, that's just the version of the song that most people will automatically think of when you mention it.)