In the Star Wars franchise, Obi-Wan Kenobi was a Jedi knight. He was Padawan to Qui-Gon Jinn, and later took Anakin Skywalker as his Padawan. He became a Jedi Master and served on the Jedi Council. After Anakin turned to the dark side and slaughtered the Jedi, Obi-Wan fought him, gravely wounding him and left him for dead. After Padmé died in childbirth, he took Luke Skywalker to Tatooine and watched over him. When Luke sought him out as an adult, he told Luke that Darth Vader killed his father, and taught him the ways of the Jedi. While on a mission to rescue Princess Leia, he was killed by Darth Vader.
There are many theories out there as to where Kenobi may have come from, but nothing definitive. I think that since you could shorten it to 'Ken', it makes it more wearable, but it might be better in the middle spot, or for a pet. Kenobi does not appear in the Social Security Administration's name database.