Re: Sulu was named for the sea
For a while, my personal theory was Sulu's first name was Napoleon. But that would have been too close to a character from another show also then airing on NBC. This theory was sort of reinforced in "The Enemy Within", when day player Jim Goodwin mangled a line which came out sounding like "Still no word from Mr. Solo, sir."
Dr. Howard, Dr. Fine, Dr. Howard: For Duty and Humanity!
--Men in Black, 1934.