Correct spelling for the English word "leeson" is [lˈiːsən], [lˈiːsən], [l_ˈiː_s_ə_n] (IPA phonetic alphabet).
There isn't a clear etymology for the word leeson as it does not have its own separate entry in most dictionaries. However, it is possible that leeson could be a variant or an alteration of the word lesson. The word lesson comes from the Old French word leçon, which in turn derived from the Latin word lectio meaning reading or lecture. This indicates that the origin of leeson could potentially be related to the concept of teaching or learning. It is important to note that without additional context or information, it is difficult to determine the exact etymology of the word leeson.