Below is a listing of the first known reference in newspapers to cricket being played by teams starting with the letter W in various settlements in Wales during the 19th century.
Watkins Printing Works 1897
Wattstown 1891
Waunifor 1882
Waunypound and Beaufort 1870
Weavers and Company 1897
Welch Regiment 1891

Credit – Glamorgan Cricket Archives.
Welsh Etceteras 1872
Welsh Mountaineers 1879
Welsh Nomads 1897
Welsh Wanderers 1863
Welsh Zingari 1882
Welshpool 1850
Welshpool Fossils 1891
Welshpool Juniors 1866
Wenvoe 1892
Wenvoe School 1891
Wenvoe Star 1892
Westfa 1896
West Glamorgan 1868
West Wales 1883
White Rose (Loughor) 1896
White Star (Pwllheli) 1876
White Star Boys (Mold) 1875
Wick 1875
Williamston 1862
Williamston Juniors 1895
Williamstown 1898
Winchestown 1893
Woodcroft 1879
Woodlands 1870
Woodlands Boys 1873
Wrexham (see Wrexham)
Wyeside 1865
Wynnstay 1859
Wynnstay House 1890
Wynnstay Juniors 1866