Kammala jumla mai zuwa: Ma'anar ethnonymic na leičiai, misali. "Lithuanians", an san shi daga tushe da yawa. Wannan kalmar ana amfani da Latvians don suna Lithuanians: leiši, sg. leitis. A cikin yaren Samogitian akwai kalmomin "leičiuoti" (don yin magana a cikin wasu ban da Samogitian, ko yin magana a cikin yaren Aukštaitian) da "leičiukas, leičiūkas" (mutumin da ke magana a cikin wani yaren da ba na Samogitian ba, yana da karin magana). Misali, kwatanta da Lithuanian na zamani "žemaičiuoti" (don yin magana a cikin yaren Samogitian). A cikin rubuce-rubucen tarihi, an san wani muhimmin misali daga wani mahalarta taron na Lutsk a 1429. John Steinkeller, wanda ya kasance memba na majalisar Wrocław (Breslau), ya rubuta a cikin wata wasika da aka aika wa garinsu, cewa Sigismund, Sarkin Roma Mai Tsarki, zai ba Vytautas taken Sarkin Lithuanians: "her wolde machen herczog Wytolten eynen konyng der Leytten". Kalmomin kalmomin, waɗanda suke da ma'anar Lithuanian, Lithuanians, Lithuania kuma ana iya samo su daga kalmar "leitis", ana samun su koyaushe a cikin tushen tarihi daga ƙarni na 14 da 15. Misali, ana ba da Lithuania a rubuce kamar "czwicshen Lythen und Prewssen" (1415); kamar "das land Litten" tare da ƙarin bayani cewa Aukštaitija ce a cikin labarin wani ɗan takara ko shaidar taron.
Yaƙin Strėva. An ba da mai mulkin Lithuanians a matsayin "die Litischen konige" a cikin tarihin Wigand von Marburg. Da alama kasancewar irin waɗannan siffofin tare da -ei- a cikin yaren Latvian (wanda aka fi sani a wani ɓangaren yamma), Jamusanci da yaren Samogitian da kansa yana da babban damar cewa siffofin na iya samo asali ne daga Balts na Yamma, amma ba a bayyana dalilin da ya sa ba su da kari -uva / -ava.