Final answer:
Sir Leonard Tilley suggested the name 'Dominion of Canada' in 1867, inspired by a biblical reference.
Step-by-step explanation:
The name Dominion of Canada was suggested by Sir Leonard Tilley in 1867. This was during the Charlottetown Conference where the terms of Confederation were being discussed. Tilley drew inspiration from Psalm 72:8 in the Bible, which refers to a dominion from sea to sea. This idea resonated well with the vision for the new country, spanning from the Atlantic to the Pacific. Thus, Sir Leonard Tilley was the one responsible for the term 'Dominion' in the name Dominion of Canada, which was officially adopted in the British North America Act of 1867.