The original title comes from two of the characters' names: Lo and Jen. Lo's name is Luo Tsiao Hu. Tsiao Hu means "little tiger". Jen's name is Yu Jiao Long. Jiao Long means "delicate dragon". Crouching tiger and hidden dragon combined is a Chinese proverb that means "talented or dangerous people hidden from view," which fits both Lo and Jen.
Lo or Dark Cloud (Luo Xiao Hu), Luo is his family name and "Xiao Hu" is his first name. "Xiao" means young, little or small and "hu" means tiger)
Jen (Yu Jiao Long), "Yu" is her family name and means jade. "Jiao Long" is her firstname. "Jiao" has multiple meanings: 1. tender, lovely, charming; 2. fragile, frail, delicate; 3. squeamish; 4. pamper, spoil. "Long" means dragon).
Lu Bi Pei, Jen's husband
Gao Lang Chiu (Jen's master both in martial arts and literature, Jade Fox is not Jen's master).