CLUB ORIGINAL NAMES

Bolton Wanderers were originally known  as Christ Church 1874. Changed their name 3 years later.
Aston Villa always knwn as since 1874
Arsenal originally Dial Square 1886 then Royal Arsenal, Woolwich Arsenal
Barnsley-Barnsley St Peter's 1887Manchester United-Newton Heath
Gillingham-Excelsior FC
Leyton Orient-Clapton Orient (owner worked for Orient Steam Navigation Co.
Sheffield Wednesday-just Wednesday FC
Leeds United- Leeds City

West Ham United once known as Thames Ironworks FC (photo below) in 1895, the works' team of the Thames Ironworks and Shipping Company which merged with the repair yard of the Castle Shipping Line, whose football team was Castle Swifts. In 1892 ship owner Donald Currie founded Castle Swifts FC, the first professional club in Essex.

Bolton Wanderers were originally formed through the Christ Church FC (in Deane Road  Football Club Bolton. Local schoolmaster, Thomas Ogden, and the Reverend Joseph Farall Wright formed a club to keep his flock on the straight and narrow in 1874. A dispute with the vicar led to the club moving away in 1877. The Wanderers addition is due to its moves between several paying areas locally.

Birmingham City was originally known as  Small Heath Alliance from 1875, changed to Small Heath 1878, Birmingham 1905 and Birmingham City 1943. They were part of the first playing of the new Football League Second Division (the team is below). Prior to that, they played in the Football Alliance from 1889-1892. This was originally formed to compete with the "southern" Football League formed in 1888.

Sunderland AFC was originally the Sunderland and District Teachers AFC founded in 1879. The team did not seem to get going until September 1880 as Sunderland AFC and open to more than just teachers, joining the Football League in season 1890-1. Photo below 1884.

Some other previous names:
Leicester Fosse 1884, West Bromwich Strollers 1878, Newton Heath Lancashire and Yorkshire Railway FC 1878, Middlesbrough and Ironopolis AFC 1889 (below) met (as Middlesbrough) and beat the Old Carthusians in the FA Amateur Cup Final in 1895.

and some previous names of famous clubs all guessable:
Burnley Rovers,
Crystal Palace Rovers,
(St Domingos FC)  the Everton Athletic,
St Mary's CoE YMA,
Stoke Ramblers 1877-8,

Swansea Town.
Boscombe St John's Lads Institute FC,
Dial Square FC then Royal Arsenal and Woolwich Arsenal,
Riverside AFC (Cardiff),
Wednesday CC,
St Mark's ,West Gorton (later Ardwick AFC)