[1] The highly irregularly shaped lake consists of two parts, about equal in size, separated by the Obisaga Narrows.

Robert Bell of the Canadian Geological Survey named the lake in 1888, but it is unknown who this Lady Evelyn is.

It is likely that Bell wrote down which Lady Evelyn he intended to name it after, but many of the notes of his 1887-1888 expeditions are missing.

[2] The original Nishnabai name for the lake is Monz-kaa-naw-ning, which means "where the moose feeds".

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