What Romanian surnames sound similar to Cashol and what would their spelling be in the cyrillic alphabet?
Specifically from the Buchovnia region.
I don't personally have experience researching in this area, but a very good friend of mine was raised in Romania. She says that they don't use Cyrillic in Romania and wondered if you were thinking of Moldova or the Ukraine. It does appear that the region you're looking at has been passed back and forth.
She says that Cashol, though an unfamiliar name to her, would be spelled Cașol in Romanian (hope you can see the marking there under the s. See https://en.wikipedia.org/wiki/Romanian_alphabet).
She also gave me this link for a website on the distribution of Romanian family names: http://nume.ottomotor.ro/en