Why is Philadelphia called the ' City of Brotherly Love '?

The motto, The City of Brotherly Love, came from William Penn, the English Quaker, who envisioned the area as a place where anyone of any color or background could live together in peace and harmony, thus, the motto about brotherly love.

Founded by Billy (OK, William!) Penn (Pennsylvania means Penn's sylvan or Penn's woods), Philadelphia is City of Brotherly Love. The name is Greek. A Franco-phile means one that loves all things French, therefore phile is love. Delphia or adelphia is person (I think there maybe some loose translation here, though). So - City of Brotherly Love.

I always thought it was just because that's what the name means, literally - Phila = Love and Delphi = Brothers, like the Adelphi in London

I wasn't going to answer this one, because so many got it right (ot at least partially right). The there are so many numbskulls who answered you, I just had to jump in. It is named after a city in Asia Minor, Philadelphia, and quite simply, the name translated means city of brotherly love. William Penn was a Quaker, who was very tolerant, but that has nothing to do with the nickname ( and Pennsylvania means penn's woods in Latin).

When William Penn first founded Philly, he welcomed all different religions in. This was one of the first places in the world where a bunch of different types of people could peacefully interact with eachother, and so it was nicknamed the 'City of Brotherly Love'.

It's because the population is predominantly homosexual