There is none
The Celtic translation for the name Joseph is Seosamh (pronounced SHOW-suhv).
Celtaidd = Celtic
speur
Nirvana has no translation.
There are six distinct languages in the Celtic group.
Valerie Baber's birth name is Valerie Kay Baber.
Valerie Azlynn's birth name is Valerie Asselin.
Valerie Stilwell's birth name is Valerie Stillwell.
Valerie Jarrett's birth name is Valerie Bowman.
There really is no 'translation' for the name; it would be the same. Note: there are more than a dozen Celtic languages, including 6 that are still spoken today. You would have to be more specific. here is a list of the 6 living Celtic languages: Irish Gaelic Scottich Gaelic Welsh Breton Manx Cornish
In Irish Gaelic it is still spelled 'Valerie'.
caomhnóir !