This article serves as an attempt to reconstruct the approximate chronological order of the major sound laws between (Late) Proto-Finnic and Proto-Livonian. A by-product of this study is a reconstruction of the Proto-Livonian phoneme system, the earlier versions of which have been more fragmentary and tentative. In the end, it is briefly discussed when and where the Livonian proto-language was spoken before its splitting into Courland and Salaca Livonian.Kokkuvõte. Petri Kallio: Ajalooline fonoloogia algläänemeresoomest algliivini. Artikkel esitab katse rekonstrueerida peamiste häälikumuutuste ligikaudse kronoloogilise järgnevuse (hilise) algläänemeresoome ja algliivi keele vahel. Selle uurimuse kõrvaltulemuseks on algliivi foneemisüsteemi ...