City of Brotherly Love (summary)

Philadelphia is called the “City of Brotherly Love” because of its Quaker influence. The name “Philadelphia” comes from the Greek words philos (“loving”) and adelphos (“brother”). A city called “Philadelphia” in Asia Minor is mentioned in the New Testament’s Book of Revelations.
 
 
A Dictionary of Americanisms on Historical Principles
edited by Mitford M. Mathews
Chicago: University of Chicago Press
1951
Pg. 332; 
City of Brotherly Love, Philadelphia, Pa.
1793 PRIEST Travels (1802) 12, I told him, that more likely the sins of the quakers had drawn down this judgment on the city of brotherly love.
       
(Early English Books Online entry) 
Ingelo, Nathaniel, 1621?-1683.
Bentivolio and Urania in four bookes / by N.I. D.D.  1660
Bib Name / Number: Wing / I175 and I179
No. pages: 2 v. ([30], 283; [20], 385, [17] p.) 
Index entry: Philadelphia, Brotherly Love.
   
An Account of two terrible fires. Which happened in the City
of Brotherly-Love, on Friday the 26th of October. From fire lightning, and
tempest Good Lord deliver us.
1764
(Title available on Evans Digital by Readex—ed.)
   
American Memory
JANUARY 9, 1779
(...)
The same conclusion seems to have prompted Sterett’s similar report on dueling in the city of brotherly love. 

24 March 1798, Weekly Magazine of Original Essays, pg. 226:
Who can pretend to accuse America of party-spirit, and especially the city of Brotherly-love?
 
11 May 1805, The Evening Fire-Side, pg. 170:
Being somewhat of a stranger in this city of brotherly love, and the customs and manners of the people very particularly attracting my attention, I have made a few remarks upon them, which I send to you to dispose of as soon as you may think proper.