Can we make isoglosses?

[Bernd]

Geese were usually paid and eaten at Martini (Nov11), the still very popular Martinigansln.
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Another hypothesis about gais-something geese: animal tithes were often named after a sort of tax.
Rauchhuhn - smoke chicken - chicken as tax for a fireplace.

Je nach der Jahreszeit der Fälligkeit und dem Zweck sind auch die Bezeichnungen Fastnachtshuhn, Feuerstätthuhn, Haushuhn, Herdhuhn, Hofstatthuhn, Kindbetthuhn, Rauchfall, Rauchhahn verwendet worden.[url=https://de.wikipedia.org/wiki/Rauchhuhn#cite_note-3][/url]

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One more thing to clarify about the 'gaismich' document.
As far as I understood the contract is about a property transfer between nobles, not the farmers actually working on the property. It's like selling an apartment that is rented to a tenant to somebody else.

The nobleman Leo von Franzhausen as landowner sells several farms to the nobleman Johann von Wildungsmauer. So my mistake, this was not land owned by the monastery as it was often the case in Austria, it was owned by these nobles who then received the tithes. The peasants working on said properties under a lease agreement are also listed in the contract as well as the tithes these peasants have to pay to the landowner. These farmers often did not own the animals either they were "Bestandsvieh" - rental livestock - which also cost a rental fee. Same for additional personnel like a goatherder.
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In this context it is very plausible that "Gaisiunge gans" indeed is an additional goose to be paid to the landowner for the goatherder boy which is an employee of the landowner and working for the farmer who runs the farm under a lease agreement and as such has to pay tithes to the land owner. Not only for the property but also for additional services. Quite complicated. To make things worse, rights to tithe coule be bought and sold independently from the property. So it was possible that parts of thee tithe were to be paid to person X and parts to person Y. But I think it is highly unlikely that "gaismich" is a name or title for it is not capitalized.


So still no idea what a "gaismich" could be.  gais- is probably goat but I cannot think about anything for -mich, it's not a suffix that makes sense. A tithe or rental fee related to goatkeeping? Four geese was a substantial payment for a tax.