Onafuwa was an instructor at Starfleet Academy during the mid-23rd century. They taught Fundamentals of Quantum Stochastics, as well as advanced one and two, and seminar. Cadet Spock took all of these and received top marks.
Una Chin-Riley characterized Onafuwa as a brilliant monster, because of the brutality of their courses. (ST: "Q&A")
This character was only mentioned in dialogue.
The Onafuwa model was likely named for them.