Welsh form of Catherine, from Greek katharos, "pure" — pure. Catrin of Berain, a sixteenth-century noblewoman, was called the mother of Wales for her many descendants.
Catrin was given to 10 babies in England and Wales in 2025. Its best year was 2000, with 108 registrations. The name is absent from American records, so there is no US curve to compare it against.
Source: Office for National Statistics, baby names for England and Wales. Contains public sector information licensed under the Open Government Licence v3.0. Scores on this page are explained in the methodology.