The name Celyn is a boy's name of Welsh origin meaning "holly". Celyn and is often added to lists like Cool Girl Names From Around the World and discussed in our forums with posts like "Picky Parents BNG".
From the experts:
Celyn, which starts with the hard K sound and rhymes with Helen, is a Top 100 name in Wales although largely unknown outside that tiny, beautiful country. It is usually a masculine name.