Featured Pendant...any idea who this person is?

Not the ones I find in a search for 'Greek Orthodox icon St Nicholas':

https://www.google.com/search?q=gre...Xhl3IEHRQfAagQ_AUoAnoECA0QBA&biw=1600&bih=758

Substituting 'Russian' for 'Greek':

https://www.google.com/search?q=rus...5qGuuA8&bih=758&biw=1600&client=firefox-b-1-d

You would think a crook would be standard for bishop saints, but even a general search for them turned up few crooked images, mostly St. Augustine.

Follow up note: I do get St. Nick with a crozier when I search for pendants. Roman Catholic depictions seem to go with it; the Eastern church seems not to & OP is Greek.

 

Guessing this is the other one Wenna found. St. Nectarios, seller in Athens:

https://picclick.com/Greece-70s-Saint-NECTARIOS-Vintage-Greek-Orthodox-Pendant-323745766071.html

 

I am not convinced, I see Άγιος Νεκτάριος Αιγίνης on the link, and I see 'Άγιος Νικ' on the one Wenna posted...

 

Must be by the same manufacturer. Don't know why they call it mop though, to me both wenna's and the seller's are imitation mop. Wenna rightly said 'pearly' instead of mop.

 

Not convinced of what? Two different images, 2 different saints, 1 manufacturer, or more than 1 using that same pearlized (agree with AJ, not really MOP) background piece but different style medallions & OP with much nicer bail.

Wenna asked who it is & country of origin. Doubts on either?

 

Yes I think you are right, 2 different saints, probably by the same manufacturer. Definitely the same culture (Greek orthodox).