Disambiguations of Rishonim
Often times, two contradictory statements of a Rishon will baffle the Poskim, and all it takes is a little history to know that there were actually two or more people with the same name, each of which said one of the contradictory statements.
It's important to be aware that there are three individuals known as the Ra'avad:
There were at least four Rabbeinu Yonahs:
- R' Yonah Gerondi (HeChassid), whom we know as Rabbeinu Yonah, cousin of the Ramban, and Rebbe of the Rashba. His grandson, son of his daughter and the Ramban's son Shlomo, was named R' Yonah after him. He had grandson who was also named R' Yonah, whose daughter married the Rashbetz and was thereby the grandfather of the Rashbash.
- R' Yonah שניין, a cousin of the R' Yonah Gerondi, who overlapped in his lifetime.
- R' Yonah author of the Sefer Issur veHetter and Talmid of the Terumat HaDeshen. Printers and Poskim mistakenly labeled his Sefer as a product of R' Yonah Gerondi, but it's clearly impossible.
- There were two Ri Baalei HaTosafots, one of whom was the Ri HaZaken, nephew of Rabbeinu Tam.
R' Asher (Rosh)
- Yad Malachi (Klalei HaRif 20)
- Shem HaGedolim (Gedolim, Aleph 9-11). See Shach Choshen Mishpat 39:2
- Shu"t HaRashbash Siman 291
- Yad Malachi (Klalei Shear Mechabrim 14), Hagahat R' Tzvi Hirsch Berlin ad loc based on Beit Yosef Choshen Mishpat 388. See Shem HaGedolim, Gedolim, Yud 98)
- HaRav Hershel Schachter (Vayakhel-Pekudei 5778, Tetzaveh 5777), Rav Meir Mazuz (Ohr Torah Iyyar 5777 Siman 86)
- Yad Malachi (Klalei Shear Mechabrim 12), Shem HaGedolim (Gedolim, Bet 46). See Chaim She'al 1:69, Matnat Yado ad loc. and Moriah Kovetz 143 page 3
- Yad Malachi (Klalei Shear Mechabrim 13)
- Shem HaGedolim (Gedolim, Zayin 13)
- Yad Malachi (Klalei Shear Mechabrim 15)
- Yad Malachi (Klalei Shaar HaMechabrim 1), Matnat Yado fn. 1-2, Shem HaGedolim (Gedolim, Aleph 237). See Shach (Choshen Mishpat 107, Yoreh Deah 105:2) and Sdei Chemed Klalei HaPoskim 15:25