Nova

Nova might be a much more commonly used a girls' name, but enough parents saw unisex appeal in it for it to debut on the US Top 1000 for boys in 2017. Nova is an astronomical term for a star that suddenly increases in brightness, then fades.

Nova is not literally a new name but one that was used a century ago mainly for girls and is now making something of a comeback. Unisex references: Nova Scotia, the long-running science TV show, and the finest kind of lox.