I believe Maroneia, Thrace is now in Bulgaria. Thrace is a cover all term that describes everything from Bulgaria on up to Krim peninsula. The area around Tyra, now Bilhorod Dnistrovskyi has been a part of many countries over it's 2500 year existence. Just in the last 150 years it has been part of the Ottoman Empire, Russian Empire, the Romania for awhile, then USSR and now Ukraine.
Krasnaya,is it possible for you to post pictures of some of your coins? By the way..here is one more that we discussed earlier