A name change for the railway was first proposed in 1942 by Arthur Cavanagh, who was chairman of the commission between 1940 and 1944. He noted that it would have the advantage of associating the railway with the province, not just the District of Timiskaming. A name change would also avoid confusion with the Texas and New Orleans Railway, which had the same initials. The Ontario railway often had boxcars misdirected in the United States, while receiving invoices that should have gone to Texas. The railway's name was changed to the Ontario Northland Railway on April 5, 1946, when a bill amending the Temiskaming and Northern Ontario Railway Act received assent.