Reply To: Calling all Talmidei chachomim – can you help?

There’s a mention of him (most likely) in a tosfos on the word “Ma” in Psachim daf 116 omud alef, regarding whether one says a brocho hamotzi on the broken piece of matza at the seder. Rabbi Gil Student, in his excellent Hirhurim blog, mentions him and his perushim in an essay on Rabbeinu Tam from July 2007, its online, but not much there.