After reading this thread, I’m glad that Kristen didn’t name her cat “Jagger”, which she was considering.
The name she was referring to in her posts is actually spelled “Jäger”, which means “Hunter” in German. It can be spelled in English as “Jager” or “Jaeger”.
The alcohol that Kristen alluded to is called “Jägermeister” and it means “Master Hunter”. The guy who named it was an avid hunter in addition to being a distiller. The name is purely branding and has little to do with the alcohol itself. (The person who named it was Curt Mast, and he spelled his first name as “Kurt” until he was 21, since he lived in Germany.) Both “Jäger” and “Jägermeister” would be great names for a cat.
“Jagger” on the other hand is derived from the Yorkshire, English slang term from the 14th century for someone who owned and/or managed a team of packhorses, working as a peddler or hawker (sort-of like a “door-to-door salesman”). Such a name would be a little less fitting for a cat.