Fionnuir and Draighean?

I’m wondering about the Irish name Fionnuir, meaning “White ghost” or “White sprite”. Fionnuir is a female name pronounced fenoor.

However, I can’t seem to find any other sites that have any information on it. It’s been rather difficult. If anybody has any information on Fionnuir at all, I’d love to hear it; it’d be really appreciated.

The other one is Draighean. This one’s a little easier to find out stuff about, but I’m still struggling to come up with any other information. Draighean is Irish and means “Blackthorn”. Pronounced drain or dray-un, I believe.

Also, for the two, I’m wondering about it’s usage and popularity during anywhere from 1900 to 1947. [name]How[/name] common were both of these, etc.

Thanks! This will be for an Irish character set in that time, just so everyone knows. ^-^