Threlfall was born in Morecambe, Lancashire, the son of fishmonger Richard Threlfall and Alice Johnson Threlfall.[4] The Threfall family originated from Lancashire and took their surname from a former manor known as Trelefelt or Threlfield.[5][6] Wilf Threlfall had an uncle of the same name from Morecambe who joined the Rochdale Hornets F.C. as a full back in 1906.[7]
It will be rather surprising if Sunderland overlook the claims of Billy Ellis and George Death for their outside left position, but the prospects are that a newcomer in Wilfred Threlfall will have done duty this afternoon. Wilf is a youngster who did extremely well with the Morecambe club last season, and was signed up by the Roker Park club as a soon as the old campaign ended. His form in trial matches has been startling.[9]
^"Mainly About Players". Lancashire Evening Post. 10 January 1931. p. 7. Retrieved 5 August 2017.
^England & Wales, Civil Registration Marriage Index, 1916-2005
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