Declining since 2013, #8,910 for boys today.
Popularity of Kyrillos since 1993
Babies named Kyrillos per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1990s | 22 |
| 2000s | 69 |
| 2010s | 129 |
| 2020s | 35 |
Meaning & origin
Kyrillos is a name with deep roots in early Christianity, particularly within the Greek Orthodox and Coptic traditions. It is the Hellenized form of Cyril, borne by Saint Cyril of Alexandria, a fourth-century theologian whose writings shaped Christian doctrine. In the United States, the name first appeared on the Social Security rolls in 1993, reflecting immigration patterns from Greek and Coptic communities. Its peak year was 2013, when it reached rank 8,910, with about 1 in 213,510 newborns given the name in the latest year of data (2025). The name has since trended downward, aligning with a broader decline in traditional religious names. Despite its low frequency, Kyrillos remains a meaningful choice for families honoring Coptic or Greek heritage, though it is not concentrated in any particular U.S. state. Its rarity ensures a distinctive identity while maintaining a connection to ancient linguistic and religious traditions.
Kyrillos is the Greek and Coptic form of Cyril, derived from the Greek 'kyrios' (lord). The name is closely associated with Saint Cyril of Alexandria, a prominent theologian, and was carried by many early Christian saints. In Arabic-speaking contexts, it is often used among Coptic Christians in Egypt.
Nicknames & variants
Nicknames: Ky, Kiro, Rillo
Sibling names for Kyrillos
Names that share Kyrillos's style, for a brother or sister.

