FISCHHOF & FRIEDLAENDER

As a follow-up to the last 2 blog entries and and earlier one concerning Julius FRIEDLAENDER, I ran across this entry in Peter Clive's book "Beethoven and His World: A Biographical Dictionary" (Oxford 2001), p.111-112:

This may represent a further piece of circumstantial evidence to support the conclusion that the book dealer and music publisher Julius FRIEDLAENDER (1820-ca.1880 (?)) was the first cousin of my great great grandmother Lina IMMERWAHR geb. SILBERSTEIN (1811-1883), because Julius would have been a "step" first cousin of the pianist, composer and professor of music Joseph FISCHHOF (1804-1857) whose library he purchased after Joseph's death.