The story
- Old East Norse · derived fromTafæistaland
- Medieval Latin · borrowed fromTavastia
- English todayTavastia
Borrowed from Medieval Latin Tavastia, equivalent to Tavast + -ia from Old East Norse Tafæistaland (attested in 11th century runestone Gs 13 as ᛆ ᛏᛆᚠᛋᛏᛆᛚᚭᚿᛏᛁ, transliterated "a tafstalãnti", normalized "a Tafæistalandi" 'in Tavastia'), from Tafæistr (“Tavast”) + land, the former probably being derived from tafʀ (“laggard”) + Æistʀ (“Estonian”).
Etymology from Wiktionary, CC BY-SA 4.0.