Petro Odynets), (2 September 1835, in Velykyi Tokmak, Berdiansk county, Ukraine – 7 May 1908, in Saint Petersburg, Russia) was a Ukrainian ethnographer and historian, statistician by profession.
His publications on this topic include: Pridanoe po obychnomu pravu krestyan v Arkhangelskoi Gubernii [Dowry according to the customary law of the peasants of Arkhangelsk governorate], Saint Peteresburg, 1873.
[3] Petro Efymenko's works were published in a number periodicals, including: Osnova, Russia; weekly newspaper Chernigovskii Listok, Ukraine (founded and edited by Leonid Hlibov); and Kievskaya starina [Kyivan antiquity], Ukraine.
1874 – Sbornik Malorossiyskikh zaklinaniy [Collection of Ukrainian spells], University Publishing, Moscow 1882 – “Arkhic Malorossiyskoy Kollehii pri Kharkovskom universitete”.
[Archive of the Ukrainian Collegium at Kharkiv University], Kievskaya starina 1882 – “Posledniy pisar Voyska Zaporozhskoho Hloba” [Hloba, the last scribe of the Zaporizhian army], Kievskaya starina 1882 – “Ssylnye Malorossiyane v Arkhangelskoy Gubernii” [Exiled Ukrainians of Arkhangelsk governorate].