Norman MacPhail Blair (14 June 1896 – 5 October 1975), who most often used the pseudonym Maurice Elwin in his professional work, was a British dance band singer and songwriter who was popular between the First and Second World Wars.

He used over 60 different pseudonyms, both as a singer and composer, including John Curtis, Maurice Kelvin, Donald O'Keefe, Guy Victor, and Max Wynn, as well as sometimes using the name Norman Blair.

In the First World War, he enlisted with the Highland Light Infantry, but seems not to have seen combat, and was eventually discharged on health grounds.

[1] He made his first known recording, as Maurice Elwin, in 1916, though it was not issued at the time, and performed with pianist and composer Isador Epstein.

[2] These were regarded at the time as "hot" bands, though Elwin also recorded with more orchestral ensembles, notably the Savoy Orpheans led by Carroll Gibbons in the early 1930s.