Generic name for Molex(tm) Mini-Fit Jr(tm)? Standard definition?
The EPSV12 v2.0 specification actually names "Molex _____ or equivalent" in the specification so it's a bit more than a de facto but not quite de jure. Several suppliers keep track of equivalency tables for the various part numbers, but not all do. Sometimes politics gets in the way of those tables being complete (for example, DigiKey keeps track of drop-in replacements but I've noticed they don't generally list any for Molex products). Molex helpfully (/s) has a database that will tell you the equivalent Molex part number, but of course it doesn't work in the other direction.