Dee ihe ga-aga n'ihu maka paragraf a - Ihe ethnonymic nke leičiai, dịka. "Ndị Lithuania", ka a maara site n'ọtụtụ ebe. Ndị Latvia na-eji okwu a akpọ ndị Lithuania: leiši, sg. leitis. N'asụsụ Samogitian e nwere okwu "leičiuoti" (ikwu okwu n'asụsụ ọzọ na-abụghị Samogitian, ma ọ bụ ikwu okwu n'asụsụ Aukštaitian) na "leičiukas, leičiūkas" (onye na-ekwu okwu n'asụsụ ọzọ karịa Samogitian, nwere olu). Dị ka ihe atụ, jiri ya tụnyere Lithuanian nke oge a "žemaičiuoti" (ikwu okwu n'asụsụ Samogitian). N'ihe odide ndị e dere ede, a maara otu ihe atụ dị mkpa site n'aka otu onye so na Nzukọ nke Lutsk na 1429. John Steinkeller, onye bụ onye otu kansụl nke Wrocław (Breslau), dere n'akwụkwọ ozi edegara obodo ya, na Sigismund, Emperor Rome dị nsọ, ga-enye Vytautas aha nke Eze nke ndị Lithuania: "her wolde machen herczog Wytolten eynen konyng der Leytten". Ụdị okwu, nke nwere ihe Lithuanian, Lithuanians, Lithuania pụtara ma yikarịrị ka ọ sitere n'okwu "leitis", na-ahụ mgbe niile na akụkọ ihe mere eme sitere na narị afọ nke 14 na nke 15. Dịka ọmụmaatụ, Lithuania ka edepụtara dị ka "czwicshen Lythen und Prewssen" (1415); dị ka "das land Litten" na nkọwa ọzọ na ọ bụ Aukštaitija na akụkọ nke onye sonyere ma ọ bụ onye akaebe nke Agha nke Strėva
Ọ dị mma. E nyere onye ọchịchị Lithuanians dị ka "die Litischen konige" na akụkọ ihe mere eme nke Wigand von Marburg. O yiri ka ọnụnọ nke ụdị ndị dị otú ahụ na -ei- na Latvian (nke a maara nke ọma na akụkụ ọdịda anyanwụ), German na Samogitian dialect n'onwe ya nwere nnukwu ohere na ụdị ndị ahụ nwere ike isi na Western Balts, mana o doghị anya ihe kpatara na ha enweghị ngwụcha -uva / -ava.