As a follow up to this M.Y. question, it seems that the first time in Tanac"h that the land is named ארץ ישראל occurs in Samuel. The Torah calls the land Cana'an or just describes its features as in "the land that I promised to your fathers" or "a land flowing with milk and honey".
Who first named the land "Israel"? (I am not referring to the country / nation that we currently have, in its current form. There are different reasons, in a sense, as to how it got its name. Please note the tag I used, as there is a similar one that I intentionally did not use.)