John L. Williams may refer to: John L. Williams (American football) (born 1964), American football player John L. Williams (Welsh nationalist) (1924–2004), Welsh nationalist activist and politician John Leonard Williams (1940–2019), Australian rules footballer John Lewis Williams (rugby union, born 1882) or Johnny Williams (1882–1916), Welsh rugby player John Lewis Williams (rugby union, born 1940), Australian rugby player John Lloyd Williams (botanist and musician) (1854–1945), Welsh botanist, author, and musician John Lloyd Williams (politician) (1892–1982), British Member of Parliament John Lloyd Williams (RAF officer) (born 1894), British air force officer
See also John Williams (disambiguation) John Lloyd Williams (disambiguation)