The author of the Seder HaDoros wrote that he found in the writings of the Chasid (pious one) R. Leib of Slutzk that the Gaon, the author of the Shelah, possessed the soul of Ruth. That is the reason that all of the verses of Ruth start with a vav with the exception of eight verses. The first letters of these verses spell out, Yeshayah B A L, which are the first letters of the words, "Ben Avraham Levi, which is amazing. - Chida, Shem HaGedolim
26 Signatories including: R. Shlomo of Lublin (the Shelah's mentor), Yehoshua Falk Katz (the author of the Sefer Meiros Aynaim , a mentor of the Shelo), R. Meir of Lublin (a mentor of the Shelo), R. Shmuel Aidels (Maharsha), . . . R. Ephraim of Luntshitz (author of the Keli Yakar ), R. Yeshaya Horowitz (Shelah), . . . (twenty six Rabbis in all)
When was he born: 1560/1570 - Very young to be included