This name was fairly popular at the end of the 19th century and beginning of the 20th. The American author F. Scott Fitzgerald used it for the character of Daisy Buchanan in The Great Gatsby (1925). The Walt Disney cartoon character Daisy Duck was created in 1940 as the girlfriend of Donald Duck. It was at a low in popularity in the United States in the 1970s when it got a small boost from a character on the television series The Dukes of Hazzard in 1979.
This is the usual form of the name Elizabeth in Spain and Portugal, though elsewhere it is considered a parallel name, such as in France where it is used alongside Élisabeth. The name was borne by two Spanish ruling queens, including Isabel of Castile, who sponsored the explorations of Christopher Columbus.
It coincides with the word (猫) meaning "cat," though it's not used as a name in Japan.
One bearer of this name is lyricist Neko Oikawa (及川 眠子), who wrote the theme song for Ultraman Max, among other things, though it's not likely that's her real name.
This name is very rarely given to girls, if given at all.
Neko (根子) is also used as a surname.