Statistics for occurrence #1 of “Knickerbocker” in chapter 5 of Bliss Perry, The American spirit in lierature: a chronicle of great interpreters:

...rested in American books. The very word Knickerbocker is one evidence of the vitality of Irving's happy imaginings. In 1809 he had invented a mythical Dutch historian of New York named Diedrich Knickerbocker and fathered upon him a witty parody of Dr. Mitchill's grave . To read Irving's chapters today is to witness one of the rarest and most agreeable of phenomena, namely, the actual beginning of a leg...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Diedrich Knickerbocker 62 8 0 0 0 user votes
Knickerbocker 72 0 0 0 0 user votes
John Knickerbocker 12 0 0 0 0 user votes
Herman Knickerbocker 8 0 0 0 0 user votes
George Knickerbocker 5 0 1 0 0 user votes
Diederick Knickerbocker 2 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.