Portishead - band - was created in 1991.
portishead
Massive Attack, Morcheeba, Zero 7
The Answer - band - was created in 2000.
Her name is Michelle Montgomery.
Million Dollar Band - marching band - was created in 1913.
Portishead Railway was created in 1867.
Portishead Town F.C. was created in 1912.
Portishead railway station was created in 1867.
Third - Portishead album - was created in 2005.
Numb - Portishead song - was created on 1994-06-06.
Portishead are generally labelled as "trip-hop" although the band members like to distance themselves from this label.
Machine Gun - Portishead song - was created on 2008-03-18.
portishead
Massive Attack, Morcheeba, Zero 7
The population of Portishead is around 22,000.
Portishead Railway ended in 1885.
The only group which I can think of that fits the requirements is the rather obscure band "CirKus"