Cyro

A sunny name with a cool -o ending, Cyro is a Portuguese and Brazilian form of the Persian Cyrus, adapted from the more familiar Ciro. The meaning of the name is contested but "sun" and "lord" are two possibilities.

Pronounced as SEE-ro in South America and SEE-roo in Europe, this spelling has attracted some attention in the US in recent years, with some parents possibly considering it as an alternative spelling to Cairo or Kyro.

Pronounced SY-ro.

As of October 2026, Cyro ranked #6533 in US births in 2025 SSA.