Years ago, in the early days of the Daily Bonnet, I created a guide to pronouncing Mennonite surnames correctly, since so many Englishers seem to have trouble with it.
https://www.ungerreview.com/proper-pronunciation-common-russian-mennonite-surnames/
Now, however, with the amazing new technology, we can hear these pronunciations for ourselves. What a world we live in. I’m sure you’ll find this video of great help.