The first known record of the name of Lithuania (Lietuva) is in a 9 March 1009 story of Saint Bruno recorded in the Quedlinburg Chronicle (Annales Quedlinburgenses). The Chronicle recorded a Latinized form of the Old Church Slavonic word for Lithuania — Литъва — Latinized as Litva (pronounced [litua]). Although it is clear the name originated from a Baltic language, scholars still debate the meaning of the word.
During the 13th century the Duchy of Lithuania was bordered by Slavic lands. The Slavs did not create the name; they used the existing Lithuanian ethnonym. The Lithuanian diphthong -ie- has, in Slavic languages, shifted to the vowel -i- (и), and the short -u- became extra-short (reduced) -ŭ- (ъ) which, being unstressed, later disappeared from the East Slavic, hence Litva. This is evidence that the Slavs borrowed this ethnonym from Lithuanians a long time ago.
During the next century, Lithuania's name was recorded in other languages, including German and Polish. In early German chronicles Lithuania's name was spelled Lettowen. In this form the German letter -e- is used to denote the Lithuanian diphthong -ie-, while -owen denotes the Lithuanian hydronymic suffix -uva (-ava). The traditional Lithuanian root -liet- is encountered in various German terms of the era, such as Lettowen, and in Latin as Lethovia, Lettovia, Lettavia, etc. For example, after becoming the ruler of Lithuania, Grand Duke Algirdas appeared as the King of Lithuania (rex Letwinorum) in the Livonian Chronicles.
In the Rus' chronicles, Lithuania's name was written as Литъва, alongside a shortened version, Литва (Litva), where -i- (и) was already used instead of the diphthong -ie. All of these names clearly originated from *Lētuvā > Lietuva, forms used by Lithuanians to identify their lands. The current form of the name Lietuva is thought to have been used by Lithuanians since the 12th or 13th century, but there are no written sources of that time, as the oldest existing manuscript in the Lithuanian language is dated back to the 16th century.