I traced back my lineage on my dad’s side to a little town called Haselünne. I never bothered to look up what in meant until now, and now, I’m really curious.
From my research, I’m going to guess that Hase would obviously come from the town’s vicinity to the river Hase, which in turn came from the Germanic haswa, meaning grey.
But lünne? I have absolutely no clue. The town's website, contains the word luenne, probably because an umlaut would reduce site visits and/or perhaps the ue would effectively represent the ü, or because something using haselunne was already taken. Who knows, but either way, sticking luenne into Google Translate returns Lünne.
So here I am, hoping someone has a theory that would give this town the other half of its name! Grey [something], or rather, [something] of the Hase. Perhaps that Lünne is someone's name. I am not very verbose in German yet, so I am left to guessing.