Mark Carney Defends Lake Ontario Name Amid US Changes

Canadian Prime Minister Mark Carney has reaffirmed that the name Lake Ontario will remain unchanged, highlighting its Indigenous origins and centuries-old history.

The name Lake Ontario comes from the Wendat word Ontari’io, which, appropriately, means “the lake is beautiful, the lake is big”.

The name is more than 400 years old, predating both the Confederation of Canada and the Declaration of Independence of the United States of America.…

— Mark Carney (@MarkJCarney) August 27, 2026

In a social media post, Carney said the name Lake Ontario comes from the Wendat word “Ontari’io,” which means “the lake is beautiful, the lake is big.”

Carney noted that the name is more than 400 years old, predating both the Confederation of Canada and the Declaration of Independence of the United States.

Against the backdrop of what he described as changes in America’s trading relationships, foreign policies, national monuments and hydronyms, Carney stressed that Canadians understand the importance of preserving the historic name.

“Canadians also know that naming reality means calling it Lake Ontario – then, now and always,” Carney wrote.

His remarks underline the cultural and historical significance attached to the lake’s name and its connection to Indigenous heritage.