The story
- Old Norse · derived fromBirka
- Old East Slavic · derived fromбьрковьскъ“of Birka”
- Russian · borrowed fromбе́рковец
- English todayberkovets
From Russian бе́рковец (bérkovec); derived from бе́рковеск (bérkovesk), Old East Slavic бьрковьскъ (bĭrkovĭskŭ, “of Birka”), ultimately Old Norse Birka, a port city in mediaeval Sweden.
Etymology from Wiktionary, CC BY-SA 4.0.