Dobre-dan Ivayla :)
Fascinating story!You are quite right about the etymology: the names Stamatios, Stamatis and Stamos are bona fide Greek names meaning "stop". However I am not aware of them having been used to insinuate birth control on this side of the border :P
By the way, when was the use of "birth control" manes popular? I imagine that prior to WWII lots of childrem was a blessing, since the Bulgarian economy (as well as the Greek) were heavily agricultural. I suspect these names bacame populat in the sixties, right?
I think it was
Winston Churchill who wrote that the best form of birth control is to spend some time with children :)
PS: You should export "lutenitsa" to the rest of the world. It is delicious, and beats the hell out of ketchup!