Cadi* (parents
Sian and
Gwilym, brothers
Ben and
Tomos)
Cadi-Elain (parents
Dylan and
Ffion, brother
Cai Emrys)
Emyr Gwilym (parents
Huw and Ela)
Dafydd Llywelyn (parents
Rhian and
Alwyn)
* The nicknames-as-first-names trend is definitely rising in Wales.
Cadi (pronounced like caddy) is a form of
Catrin, so I guess it's pretty much the Welsh equivalent of
Katie. I prefer
Catrin, personally.