Sagan is a Slavic surname-style name, also used as a place name, with a crisp modern feel.
Sagan is a surname-turned-given-name whose most defining association is Carl Sagan (1934–1996), the American astronomer, cosmologist, and author who became the twentieth century's most eloquent popularizer of science. His PBS series Cosmos: A Personal Voyage (1980) reached an estimated 500 million people in sixty countries, and his lyrical meditations on the scale of the universe — most memorably the "Pale Blue Dot" passage — gave science an almost devotional beauty. The surname Sagan is of Ashkenazi Jewish origin, likely derived from Żagań, a town in present-day western Poland (historically Sagan in German), from which Jewish families took the name during the era of surname adoption in the eighteenth and nineteenth centuries.
As a given name, Sagan began appearing notably in the early twenty-first century, driven almost entirely by admiration for Carl Sagan's intellectual and humanistic legacy. Parents who choose Sagan are typically making a deliberate statement: a tribute to curiosity, scientific wonder, and the kind of cosmic humility Sagan championed — the recognition that we are "a mote of dust suspended in a sunbeam." The name has a pleasant sonic quality independent of its associations: two syllables, clean consonants, a slightly enigmatic feel.
It is now used for children of any gender, a fitting reflection of Sagan's vision of a humanity that transcends its smaller divisions. Few names carry so explicit a philosophical aspiration.