Who was/were the first club(s)?
....
On 29 August 1895 twenty-one clubs met at The George Hotel in Huddersfield and formed the Northern Rugby Union (later to become known as Rugby League). The clubs and their year of foundation were:
Batley 1880, Bradford 1863, Brighouse Rangers 1878, Broughton Rangers 1877, Dewsbury 1875, Halifax 1873, Huddersfield 1864, Hull 1865, Hunslet 1883, Leeds 1890, Leigh 1877, Liversedge 1877, Manningham 1876, Oldham 1876, Rochdale Hornets 1871, St Helens 1874, Tyldesley 1879, Wakefield Trinity 1873, Warrington 1875, Widnes 1873, Wigan 1879.
Dewsbury withdrew a few days later and were replaced by Runcorn (1876). Stockport was also accepted by telephone at the meeting at The George. The inaugural competition which the 22 founding clubs played for was called the Northern Rugby Football League (NRL).