Heraldic emblem [ Emblem and flag ]
A) A figure of a white horse - perhaps the symbol of the location of Ostrava at the meeting point of many roads; perhaps from the coat of arms of the founder and the first bailiff in Moravian Ostrava.
B)A golden rose - from the family coat of arms of Stanislav Thurz, the bishop of Olomouc.
The city is named:
- after the Ostravice river formerly called the Ostrava river
- a compound word from two word roots, OSTR + AVA (rough water)