At first I thought this might well be another Jonah -- there are certainly many people in the Bible who share the same name, such as all the Marys and Josephs of the New Testament -- but checking the opening line of the Book of Jonah shows it's definitely the same guy: "Now the word of the Lord came unto Jonah the son of Amittai . . ." (Jonah 1.1). There's not a lot of cross-referencing between the later parts of the Old Testament, so this reference took me a bit by surprise. A nice little detail to know about, and something I missed during the previous time I read all the way through the Bible (where I didn't read the books in order but skipped around a good deal*).
The second was a piece of Jewish legendry I came across,** recounting that there was an old tradition that Jonah is the boy Elijah the prophet raised from the dead, the widow's son (cf. 1st Kings 17.17-24). This is just a tradition, like the idea that Mary Magdalen might be the woman in the 'cast the first stone' story, but it's an intriguing one, I thought.
current audiobook: The Book of Esther
*also, that time I did the chapter-a-night approach and took about two and a half years to read the whole thing, by which time my memory for the details of some of the parts I'd read earlier on had somewhat faded.
**in wikipedia, 'the source of all knowledge'