Patanjali

Patanjali brought together and condensed many philosophies of yoga into a relatively clear text - the Yoga Sutras.  He lived in India around 200 BC.  As with many important historical figures of that time, there is a lot of myth associated with Patanjali.  One is that he is an incarnation of the snake that Vishnu rests upon (which has many names, one of which is Shesha Nag).  He came to Earth to learn to dance (to please Vishnu) and was born to a yogi woman who passed her vast knowledge onto him.
The name Patanjali can be broken down into "pata," which is translated both as "fallen / downfall" and "leaves," and "anjali," which means "offering / gesture of reverence."  Because of the story of Patanjali being an incarnation of a god, I like the translation "fallen offering," or "fallen angel."  However, as we're learning, there are many interpretations of sanskrit, and as Manorama taught us, you can't learn a facet of something and check it off the list of things to learn.