'Dragon' is draig in Welsh.
Names aren't 'translated' into Welsh, some names have a Welsh equivalent but many don't.
There are 4 main teams who play in the Magners league they are Ospreys, Cardiff Blues, Newport Gwent Dragons and the best of all llaneii Scarlets
tri deg draig
there are many welsh traditions but the welsh celebrate a festival called Eistedfodd, St. Davids day , and a day called 'Calan Mai' Daffodills, Leaks, and red dragons are all welsh symbols. welsh cakes, and Cawl ( Soup) are traditional welsh foods.
Yes, Daenaerys Targaryen's dragons do have names. The dragons are named Viserion, Rhaegal, and Drogon; named after her two deceased brother's and husband.
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Glaedr
Names are not translated; but the Welsh version of Steven is Steffan.
It is a common misconception that names change in Welsh, there are a few name which change, but only first names. Last names remain the same.
The word 'tinker' is tincer or eurych in Welsh. Names aren't translated.
Some good names for fierce dragons could be Blazeclaw, Infernothorn, Scorchwing, or Emberfang.