Origins

When modern men's football began in the mid-Victorian era, there were a number of ways in which teams originated.

Some teams (especially in the South) were old schoolboy teams, some were formed as extensions to cricket teams to give the players a winter amusement, some were formed from pubs and some were formed by churches.

Similarly the formation of clubs in women's football can be grouped together.

Pub Teams Teams formed as pub or social club teams.

Sheffield Wednesday :- formed at the Star Inn, Rotherham
Breakaway Several teams were formed by reserve team members of one club looking for first team football and forming a new team in order to do so.

Osset Albion :- formed by the reserves of Wakefield Town
QPR LFC :- formed by members of QPRWFC
Clapton LFC :- formed from Crystal Palace Reserves
Colchester Royals :- originally Colchester Falcons - junior side to Colchester United
Covden Body Rangers :- formed from Wolves res 
Knaresborough Town :- formed by members of Harrogate Town
Stockport Celtic :- formed from Stockport County res
Tottenham LFC :- formed from Spurs res
St Germaine :- split from Harlow Town
ASC Dayncourt :- formed by members of Arnold Town reserves after they folded.
Men's Teams Clubs formed by official supporters' clubs, unofficial groups of supporters or people associated with a club.

Arnold Town :- formed by supporters of Notts County
Norwich City :- formed by Norwich City's Kit Carson
Watford :- formed as part of supporters club
Arsenal :- formed by Arsenal kit manager Vic Akers
Birmingham City:- formed by supporters
Doncaster Belles :- formed by supporters
Millwall Lionesses :- formed by supporters
Wimbledon :- formed (as Friend of Fulham) by Fulham supporters
Projects An offshoot of the above - clubs formed by official schemes run by professional clubs.

Bradford City :- formed as part of Football in the Community scheme
Manchester City :- formed with help from Football in the Community scheme
Oldham Curzon :- formed by development officer for Oldham Athletic
Cambridge United :- formed as part of council initiative
West Ham :- formed by community officer at WHU
Company Teams The most famous of these would be Dick, Kerrs - where a group of workers club together either with official backing, or just as a group of like minded individuals.

Barnet :- formed by London Transport Employees as District Line
Brighton :- formed by GPO employees
Langford :- formed by telephonists at Luton Exchange
Charity Teams who were originally formed for a charity match, but then carried on into league football.

Wakefield Town 
Barnsley
5 a-side 5 a-side teams that eventually grew.

WBA
Enfield
Sunderland WFC (as Cowgate Kestrels)
Harlow Town
Girl's Teams Girls' teams had a problem when the girls outgrew the team. Some managed this problem by starting teams in older categories, until they formed ladies' (or women's) teams

Bristol Rovers 
Charlton LFC :- formed as Kidbrooke(U16)
Enfield :- Formed as Merryhill Girls
Port Vale :- Initially U13 and U16 (as Newcastle Town)
Reading Royals :- formed as Twyford Comet Girls
Watford :- started as Watford Town Girls before merging with Watford LFC
Mill Hill Utd :- formed from a junior school
Haywards Heath :- began as U14 team
Stockport County :- formed from Stockport Girls