The Eight Main Cities of the Eight Main Families were indeed located on Eight different Mountains!
However the northern mountain where the Greenwood City was located! Where the Silverwood Family resided was actually the second largest mountain.
Both in size and scale out of all the Eight Mountains on the Northern Continent.
Furthermore it was also one of the four naturally formed mountains in the continent! Present since time immemorial.
Meanwhile..
The Southwestern! Southeastern! Northwestern! And Northeastern Mountains were actually artificially created Mountains!
Created by The Ravenous Family! The Ambercrown Family! The Nightingale Family! And The Frostcrown Family Respectively.
And just as mentioned before; The Greenwood City was without a doubt the largest city out of all the Eight Main Cities.
But the northern mountain wasn't the largest mountain! That particular title belonged to the southern mountain.