Cersei is a feminine given name of contemporary origin, introduced in the late twentieth century by author George R. R. Martin in his epic fantasy series A Song of Ice and Fire and subsequently popularized through the HBO adaptation Game of Thrones. Pronounced /ˈsɜr.si/ in English, the name displays no verifiable antecedents in traditional onomastic registers prior to its literary debut; etymological conjecture suggests a morphological nod to the ancient Greek name Circe, albeit modified to establish a unique phonetic and orthographic identity. Within the United States, Cersei has maintained a strict rarity among female newborns, recording between six and eleven occurrences annually from 2017 through 2024 and consistently ranking in the mid-900s of Social Security Administration data. This statistical profile, coupled with its high-profile media association in Anglo-American culture, exemplifies the influence of contemporary fiction on naming practices and underscores the capacity for modern narratives to generate entirely novel appellations in the onomastic landscape.