In the 'About' section of this profile I read: "He is also mentioned in a record (#2898) where the "Herr von Hanau" (meaning something like important man of Hanau, not "Mr. Von Hanau", writes to the Frankfurt authorities with regard to Natan. Unfortunately, the details aren't given. This is dated January 1497." The descending branches of Natan zum Kessel indicate Cohanic affiliation.
This brought to mind the Jacobi's hypothesis regarding the Cohen "A" Family: p. 191, A1(a),(b), Vol. 1: two Cohanic families also from Hanau, but who went to Altona, rather than Frankfurt and Metz as did the branches of Natan zum Kessel.
An interesting research plan would be to consider a common ancestry for the following five branches using a ydna-based validation study: 1) Menachem HaKohen 2) Schlomo-Seligman Jehudah HaKohen 3) Rabbi Kalman ben Nathan Katz 3a) Feibesch-Uri Katz zum Wedel, zum Wedel 4) Salomon Kalman Cahen, Kayn an der Pforte z. grunen Tur NB: Branch (4) has already completed the BY700 test and found to be J1-ZS2374.
According to Jacobi (1) and (2), which are the two main Hanau-Cohen "A" branches, should share a common ydna ancestor, and according to the GENI tree (3) and (4), which are the two main Natan sum Kessel branches (apparently also from Hanau), should share a common ydna ancestor. (3a) is a sub-branch of (3), worth validating independently of any other (3) line since it is the Katz-Schiff line. If the entire group, or any sub-set thereof, coincide in test results, then it would confirm the common ancestry of the entire group, or the sub-set(s) thereof.
It would be up to descendants of these lines to do the groundwork (which is not onerous via at-home test kits) to conduct such a study. My purpose here has been only to highlight an interesting research possibility for future reference.