This is the 9014th most frequent Russian word.
ривненского
"Rivne" refers to something related to Rivne, a city in Ukraine.
The word 'ривненского' is used as a possessive adjective derived from 'Ривне', the name of a city, indicating association with Rivne.
Ривненского студента наградили за достижения в учёбе.
The student from Rivne was awarded for academic achievements.
Here, 'ривненского' describes the origin or affiliation of the artist to Rivne, functioning as a descriptor.
Мы посетили музей ривненского художника.
We visited the museum of the artist from Rivne.
In this instance, 'ривненского' indicates that the football club is based in or associated with Rivne.