Olej

== Czech == === Etymology === From olej (“oil”). === Pronunciation === IPA(key): [ˈolɛj] === Proper noun === Olej m anim (female equivalent Olejová) a male surname ==== Declension ==== === Further reading === “Olej”, in Příjmení.cz (in Czech) Moldanová, Dobrava (2019), Naše příjmení [Our surnames] (in Czech), 5th edition, Prague: Agentura Pankrác, →ISBN, page 130 == Slovak == === Etymology === From olej (“oil”). === Pronunciation === IPA(key): [ˈɔʎej] === Proper noun === Olej m pers (female equivalent Olejová) a male surname ==== Declension ==== === Further reading === “Olej”, in Slovníkový portál Jazykovedného ústavu Ľ. Štúra SAV [Dictionary portal of the Ľ. Štúr Institute of Linguistics, Slovak Academy of Science] (in Slovak), https://slovnik.juls.savba.sk, 2003–2026