Reuven Friser, son of Shmuel, died in 1902, has a long list of his direct ancestors on the gravestone, and what a list!
G1. R. Meir Katzenellenbogen, ABD Padua.
G2.1. R. Samuel Judah Katzenellenbogen, ABD Padua and Venice.
G3.2. Daughter, married R. Joel Ashkenazi (-Katzenellenbogen).
G4.2. R. Abraham (Joseph Jacob) Ashkenazi‑Katzenellenbogen, born about 1549 and died in Lvov on April 30 (6 Iyar), 1637.
G5.4. R. Jacob Katzenellenbogen, succeeded his father as ABD of Lvov, died there on February 28 (13 Adar), 1660.
G6. R. Abraham Katzenellenbogen, Dayan in Brest-Litovsk, married his first cousin, daughter of R. Bezalel, son of R. Benjamin Aaron Slonik.
G7.3. R. Ezekiel Katzenellenpogen, ABD Altona-Hamburg-Wandsbeck, born in 1668 or 1669 and died in Altona, July 9 (23 Tammuz) 1749.goes back to Saul Wahl through his wife Esther
G8.1. R. David Katzenellenpogen, born about 1690 and died about 1756.
A second connection:
Dr. Neil Rosenstein wrote a book about Shaul Wahl.
See his website http://tali.com/neilr/
In 1908 his son Eli(yahu) Friser died and was buried next to him.