It means Chist or Izvesten.
I can find no Welsh equivalent for the name "Claire'.
Miglena (Maggie)is a bulgarian name.It comes from the old bulgarian word ¨meglen¨ that means wind.
It is Latin for 'Clear'.
Mishka means mouse in Bulgarian.
Bright, light
it means sundown.
The English Christian name Amy means "beloved" and derives from Latin Amata; the modern Italian version is the same as the Latin, but in French it is Aimée. Bulgarian may have adopted the name but it is definitely not Bulgarian in origin and has no such meaning in the Bulgarian language.
The name Kamen means "stone" in the Bulgarian language. Kamen= Peter, Pierre etc.
Български художник is Bulgarian for (a) Bulgarian artist.
Clear / bright. English version is Claire
Sinclaire is a male name that means St. Claire.
I suppose you mean "Marie-Claire", the first name and magazine name.