Cillian is a ♂ boy’s name.
The Irish name Cillian derived from the Celtic name Ceallach or the Irish name Cillín.
Cillian means “little warrior” and “bright-headed” (from Celtic “ceallach” = war/battle/strife/bright-headed) and “monk’s cell” or “little church” (from Irish “ceall” = church/monastery).
Based on the frequency of positive ratings, we can analyze how popular names are in different countries. The name Cillian is currently ranked #565 on the name leaderboard.
Curious about more trends? Find out which names are most popular in the USA, Canada, Australia, and worldwide.
2025 | 2024 | 2023 | 2022 | 2021 | 2020 | |
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🇧🇷 Brazil | - | - | - | - | ✓ | ✓ |
🇬🇧 Great Britain | - | - | - | - | ✓ | ✓ |
🇮🇪 Ireland | - | ✓ | ✓ | ✓ | ✓ | ✓ |
🇵🇹 Portugal | - | - | - | - | - | ✓ |
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