Also my great great grandfather lived between 1823-1891. But he had a son called Jaan Aidas as well, who lived 1860-1921, so I was a little unsure about which Jaan it´s about. But since the first one is from 1875, so I´m guessing it should be Jaan the older...
Here is the link to the documents: http://tellimused.ra.ee/Aidas_7379-7382/
EAA.932.1.1616
Vana-Tänassilmast Jaan Aidas Johann Jaansoni vastu nõudeasjas
EAA.932.1.465
Jaan Aidas Johann Jaansoni vastu talu asjus
EAA.919.1.5302
Acta in Beschwerdesachen des Alt-Tennasilmschen (Vana-Tänassilma) Bauern Jaan Raudsepp, Namens seiner Mündel Kadri und Rööt Raudsepp wider ihren Stiefvater Jaan Aidas betreffend verweigerte Abtretung des Raudseppa Gesindes
EAA.919.1.3564
Acta in Sachen des Jaan Aidas aus Alt-Tennasilm (Vana-Tänassilma) wider den Andres Laur aus Schloss-Fellin (Viljandi) in puncto indemnisationis