Today, in a shiur, I heard someone quote an opinion of the "קדוש מרדוש" (pronounced "Kadosh Meradoosh", I think). The Bet Yosef in E"HE 35 seems to quote the מרדכי who quotes him, so apparently he's a rishon. This is likely the same person who R' Akiva Eiger in Gittin (4th chapter) calls מהר"י מרדוש.
Who is the author of this work and when was it written? Is it an independant work or just someone whose shitot are quoted by others?
In what form was this work written (i.e. a perush on Talmud, an explanation on Mishnah, a sefer Halacha...)?