Even though they are different languages, I still notice some similarities. In this case your wife's name contains two parts 'Hong' and 'Ngoc'. It sure looks as though the Vietnamese 'hong' is the same as the Mandarin 'hong' for red, yes? Additionally,in several Asian cultures jade is held in high esteem with many stones' names containing the phoneme 'Yu'. Is it possible that Ngoc has the same meaning as Yu?
If this is the case, Hugh, is your surname Ngoc? [I ask because my wife's surname is Yu.]
Call me a geek, but I find all the Asian languages' similarities and ancestries very interesting.