You’ve offered no proof that the popularity of “Madison” is due to the name of a character in a 1984 movie. In 1990, the name Madison ranked 216 among most popular baby names; the following year it shot up to 133. When fad names are inspired by characters in pop culture, there is not a delay effect; the highest number of babies named so occur around the movie or television show’s release. For example, over 80% of the American-born babies named Kunta were born in 1977, the year of the miniseries Roots. The popularity of the name (see AnyBirthday.com) dropped precipitously after that year.
Madison as a given name is hardly new; the Social Security Death Index shows 2,490 persons in the U.S. with that first name died in the period 1962-2002.
The given name Destiny follows a long established practice, found throughout the Western world, of naming a child after a particular quality. For examle, Faith, Hope, Charity, and Prudence, were popular girls’ names among English-speaking peoples the 18th and 19th century, while Desiré and Desirée were popular among French-speaking peoples.
Mackenzie also follows a long-established shift of surnames to given names, a practice that was already gaining in England in the late 19th century.
I know, I could be conviceted of Child Abuse.