Analysis of information sources in references of the Wikipedia article "Soon-Yi Previn" in English language version.
Nobody knows how old Soon-Yi really is. Without ever seeing her, Korean officials put her age down as seven on her passport. A bone scan Mia had done on her in the U.S. put her age as from five to seven. In the family, Soon-Yi is considered to have turned 20 this year, on October 8 [1992].
She first comes into view in about 1975 as a 5-year-old runaway on the streets of Seoul. (There are no extant records of Soon-Yi's early life, but a document signed by both Mia and André Previn, her adoptive father, ... has her date of birth as October 8, 1970.)
