In modern English, zenith means "the highest point or state; peak" and in astronomy, refers to "the point in the sky vertically above a given position or observer" or "the highest point in the sky reached by a celestial body."
In the English-speaking world, this name has been in occasional use from the late 19th century onwards.
Its modern use as a feminine name may have been influenced by the British-American author Taylor Caldwell (1900-1985). Since 1990 it has been more popular for girls in the United States. Other England-speaking regions have followed suit, with the exception of England and Wales where it is still slightly more popular for boys. Its popularity peaked in America the mid-1990s for both genders, ranked sixth for girls and 51st for boys. A famous bearer is the American musician Taylor Swift (1989-).
The currently used English word medley refers to "a mixture, especially of heterogeneous elements; a hodgepodge; a jumble".
One fictional bearer of this name is Kirari Momobami (桃喰 綺羅莉) from manga and anime 'Kakegurui – Compulsive Gambler'.
This name died out after the Middle Ages, but was revived in the 19th century. In America and other countries it became fairly popular in the second half of the 20th century. A famous bearer of the surname is former basketball star Michael Jordan (1963-).