Final answer:
The term "Who da Low Stain (Double OG)" does not correspond with a widely recognized nickname for any of the given artists. It could possibly be a misunderstood or informal reference, and without further context, we cannot conclusively attribute it to Kendrick Lamar, Lil Wayne, Drake, or Travis Scott.
Step-by-step explanation:
The artist referred to as "Who da Low Stain (Double OG)" is not a commonly recognized nickname for any of the options provided, which include Lil Wayne, Drake, Kendrick Lamar, and Travis Scott. Without additional context, it's challenging to attribute this name definitively to one of these artists, as nicknames can be informal and not widely recognized. However, when considering the body of work and the general lyrical content, Kendrick Lamar is known for his depth and the use of layered meanings in his lyrics, which could suggest a link to such a moniker.
Moreover, Kendrick Lamar's narratives often deal with themes of identity and complexity, which could relate to nicknames emphasizing multilayered personas. It is essential to exercise caution when assigning nicknames to artists, as these can often be misinterpreted or linked to the wrong individuals if not adequately referenced within popular culture or the artists' own material.