"yoliivoi" = "night owl"; "yolapoi" = "night flutterer"; "yolepakko" = "night flutterer".Karelian Tver "yolakko" = "night flutterer".Livonian "siksparnas" = "leather wing".Veps "olapak" = "night flutterer"; "olapakaine" = "night flutterer"; "opalak" = "night flutterer".Votian "olakko" = "night flutterer".Germanic LanguagesDanish "flagermus" = "flutter mouse".Dutch "vleermuis" = "flutter mouse".English (C) "bat" = ?; "rearmouse/reremouse" = "moving mouse" (5); airemouse/airymouse/hairymouse" = "air mouse" (6); "flittermouse/flindermouse/flickermouse" = "flutter mouse". Flemish "vleermuis" = "flutter mouse".Frisian "Fleermuus" = "flutter mouse".German "Fledermaus" = "flutter mouse".Icelandic "le(u)rblaka" = "leather rag".Norwegian " flaggermus" = "flutter mouse".Swedish "fladdermus" = "flutter mouse"; laderlapp" = "leather rag" (7).Yiddish "fledermoiz" = "flutter mouse".Romance LanguagesCatalan "rat-penat" = "feathered mouse"; "rata-penada" = "feathered mouse"; "muricech" = "blind mouse".French "chauve-souris" = (seemingly) "bald mouse", but possibly an alteration of Latin "cawa sorix" = "owl mouse".Italian "pipistrello" < Old Italian "vipistrello" < Latin "vespertilio" = "the little evening one"; "chirottero" = "hand wing" < Greek "- = "hand" + "-" = "wing".Moldavian (D) "lilijak" = ?.Portuguese "morcego" = "blind mouse".Rhaeto-Romanic "volanotte" = "night flyer", "sgolanotg" = "night flyer".Romanian (D) "liliac" = ?.Spanish "murcielago" = "blind mouse".Slavic Languages>(East Slavic)Belorussian "kazan" = "the leather one"; "netapyr" = ?.Russian "letucaja mys'" = "flying mouse" (8); "kozan" = "the leather one"; "netopyr'" = ?.Ukrainian "kazan" = "the leather one"; "netopyr" = ?.>(South Slavic)Bulgarian "prilep" = "the one who sticks, adheres to"; "netopyr" = ?.Croatian "slijepi mis" = "blind mouse"; "sismis" = "? + mouse" (9); "netopir/netopier" = ?.Macedonian (D) "liljak" = ?Serbian "slepi mis" = "blind mouse"; "sismis" = "? + mouse" (9); (D) "ljiljak" = ?; "netopir" = ?.Slovene "netopir" = ?.>(West Slavic)Czech "netopyr" = ?.Polabian ?; cf. "netupar" = "butterfly" (10) (11).Polish "nietoperz" = ?.Slovak "netopier" = ?.Sorbian Lower "njedopyr'" = ?.Sorbian Upper "njetopyr" = ?.Other LanguagesAlbanian "lakuriq nate" = "naked owl".Basque "saguzar" = "old mouse".Greek "" = "the night one".Romany "korro simijako" = "blind mouse"; (D) "lilijako" = ?.Turkish (E) "yarasa" = ?.Unclear Etymologies:(A) Gaelic "iatlu/ialtag/dialtag"; Irish "ialtog":The original meaning of these words remains a mystery. Stuber [1998:116] has this to say on the subject: "MIr. iatlu: iatlu "bat", the gender of which is uncertain, does not occur in any Old Irish text. No etymology has been found so far" (14). Quin [1976] has Irish "ialtog" (he gives the form "ialtoc") as a diminutive of "iatlu" by way of metathesis. MacBain [1982] quotes the Early Irish forms "iathlu" and "iatly", which would support Quin's contention. Maclennan [1925] gives Gaelic "dialtag" as a "by-form of ialtag". Dwelly [1973] also notes the Gaelic compounds "ialtag-anmoch" = "evening + ?" (MacBain [1982] has "dealtag-anmoch") and "ialtag-leathair" = "leather + ?". On the strength of these compound forms, it is hard for me to believe that, in the case of Gaelic "iatlu/ialtag/dialtag" and Irish "ialtog", we are dealing with "taboo" words. A "taboo" interpretation is rendered less likely for these words in the face of two other Celtic designations, viz. Gaelic "feasgar-luch" = "evening mouse" and Irish "sciathan-leathair" = "leather wing".(B) Hungarian "denever":Benko [1967-] says the following in his entry for "denever": "Ismeretlen eredetu". A denever ~ denevere, tenever ~ tenevere es teneri alakvaltozatok viszonya