Bielawski (; feminine: Bielawska; plural: Bielawscy) is the surname of a Polish noble family originating from Bielawa, Masovian Voivodeship. The family bore the Jelita coat of arms. The same family confirmed nobility in the Russian Empire in Vilnius (Wilno), where it used the Jastrzębiec coat of arms. In Russia this surname is transliterated as Belyavsky (Russian: Белявский, masculine) or Belyavskaya (feminine).
| Language | Masculine | Feminine | |
|---|---|---|---|
| Bielawski | Bielawska | ||
| Belarusian (Romanization) | Belarusian: Бяляўскі (Bialiaŭski) | Belarusian: Бяляўская (Bialiaŭskaja) | |
| Russian (Romanization) | Russian: Белявский (Belyavsky, Belyavskiy, Beliavsky, Beliavskiy) | Russian: Белявская (Belyavskaya, Beliavskaia) | |
| Ukrainian (Romanization) | Ukrainian: Бєлявський (Byelyavskyy, Bieliavskyi) | Ukrainian: Бєлявська (Byelyavska, Bieliavska) |