Which Great Lake borders Michigan but is not named after the state?

The correct answer is Lake Ontario, which is indeed a Great Lake that borders Michigan but is not named after the state. While Lake Ontario is not directly adjacent to Michigan, it is part of the Great Lakes system and is the closest of the lakes to Michigan's eastern border when considering the entire Great Lakes region.

The other lakes mentioned are named in relation to the state or population. Lake Michigan is entirely within the United States and is uniquely linked to the state, being the only Great Lake located entirely in the U.S. Lake Huron borders Michigan and is part of the boundary that separates the state from Canada; it is also closely linked to Michigan, especially through the Lower Peninsula where significant shoreline exists. Lake Erie, while bordering Michigan on the south through the lower part of the state, shares similar naming conventions as it is related to the Erie tribe.

In conclusion, Lake Ontario is the only Great Lake among the options presented that does not hold a direct geographical or naming connection to Michigan, making it the correct answer in this context.