Caio

Did you know?

A few things about Caio you might not know, from US birth records and Wikipedia. Handy for convincing a partner, or a grandparent.

⭐ Famous Caio

Caio Lucas

Emirati association football player

Choose Caio and your child shares a first name with Caio Lucas, an Emirati association football player. A ready-made answer when someone asks “Caio, like who?” Caio Lucas's Wikipedia article is available in 30 languages, a good sign of just how widely known they are.

Read about Caio Lucas on Wikipedia ↗ (opens in a new tab)

Photo: Anton Zaitsev, CC BY-SA 3.0 (opens in a new tab), via Wikimedia Commons

• 👶How commonAbout 1 in every 48,780 baby boys born in the US in 2025 was named Caio, 35 babies in all. In a typical school of 500 kids, your Caio would very likely be the only one.
• 📜HistoryCaio first shows up in US birth records in 1990, the first year at least 5 babies got it. It has been in use for 35 years since.
• 🏆Best yearIts best year was 2023, when it reached #3,055.
• 📈Then vs nowCaio is 3.7× more common today than it was in 2000. In 2000 it was given to about 1 in 178,571 baby boys; in 2025, about 1 in 48,780.
• 🚀TrendCaio has climbed 827 places in the US rankings over the last five years and now sits at #3,314. Fast risers like this often keep climbing, so expect to hear it more.
• 📍Where it's lovedCaio is most popular in Massachusetts, where it ranks #789. It's in the top 1,000 in 1 state.
• 💬MeaningCaio is a Portuguese form of Gaius, which means “rejoice”.

About the name Caio

Caio is a boy name of Welsh origin meaning “rejoice”. It has 4 letters and 2 syllables, starting with C and ending in “-aio”. US birth records list Caio for boys from 1990 to 2025, in 36 of those 36 years. Its best year was 2023, when it ranked #3,055 among boy names. In 2025 it ranked #3,314, with 35 babies.

Origin:Welsh names