Jäger is one of the more common German surnames: 75th place in Germany (ca. 55000 people 2002), 96th place in Austria. In the German speaking areas Jäger is most common in Central Germany (Hesse, Thuringia), in the Upper Rhine Area (Baden-Württemberg, Alsace, Moselle) and in Western Austria (Vorarlberg, North Tyrol). The modern occurrence in big cities like Berlin, Hamburg, Munich, Vienna, etc. is most likely from migrations in the last 6 generations and therefore less indicative for deep origins.
Name Variants in Germany: Jäger, Jaeger, Jager; Austria: Jager, Jeger; Italy: Jagher, Iagher; New World: Yeager, Hunter, Jagger, Jeager, Jeker, Yager, Yauger, Yeger. 

See research Document:

Jäger/Yeager Y-DNA Genealogy

Earliest known paternal Y-Lineages with early male descendants and Y-Results
(before 1800 / in Europe)

docs.google.com/document/d/1HmCrQLz3N_RMNXvQhGq0VCtrc2Tfs85mdM_AMo5pvAU/edit?usp=sharing

Last Update: 2022