So here's the deal. It's complicated, bear with me.
Back some years ago, a guy named Ralph Davis imported a snake from africa. It looked weird. He named it the "Platinum".
He bred the platinum, and hatched out normal phenotype animals, and something that wasn't a normal phenotype. However, they didn't look like dad, so he concluded that dad was more than just a single trait phenotype.
The new babies, he called "lesser platinums".
The founding snake phenotype is now known as "platty daddy", since that phenotype was the father to lesser platinums. The extra allele that makes them just POP and glow also acts similarly with butter-line animals, and that phenotype is referred to as "butter daddies".
Lesser platinums are often called "lesser" for short.. just like many morph names have been shortened.
Enchis were once called "Enchi pastels".
Cinnamons were once called "cinnamon pastels".
There are others, but I'm spacing on them as it's kind of late.
Black pastels haven't dropped the "pastel" from their name yet, but they do add confusion to newcomers to ball python morphs.
It's confusing, but I hope that I did a decent job of explaining it.
Lesser = lesser platinum.
Lesser mojave = blue eyed leucistic (with 1 lesser platinum allele and 1 mojave allele), since the locus for those two alleles is the same.