Source : Webster's Revised Unabridged Dictionary (1913)

Philadelphian \Phil`a*del"phi*an\, a. [Gr. filadelfia brotherly
   love, from fila`delfos brotherly; fi`los loved, loving,
   friendly + 'adelfo`s brother.]
   Of or pertaining to Ptolemy Philadelphus, or to one of the
   cities named Philadelphia, esp. the modern city in
   Pennsylvania.

Philadelphian \Phil`a*del"phi*an\, n.
   1. A native or an inhabitant of Philadelphia.

   2. (Eccl. Hist.) One of a society of mystics of the
      seventeenth century, -- called also the Family of Love.
      --Tatler.