Grand Duchess Maria Pavlovna the Elder's grandfather Prince Heinrich LXIII. Reuß zu Köstritz owned the Saxon estates of Klipphausen, Spreewiese / Leichnam / Lichań and Klix / Klukš, of which the last two villages both were Sorbian-speaking in the 19th century. His daughter Auguste, future Grand Duchess of Mecklenburg-Schwerin and mother of MP, was confirmated in Klix by the local pastor Karl Traugott Kanig (Korla Bohuwjer Konik), who was a Sorbian language activist. Her father, as patron of the parish, had nominated Kanig as local pastor instead of the congregation's own candidate, the deacon Andreas Seller, better known as the great Sorbian poet Handrij Zejler, who was a radical.
This according to Lebensbilder aus der Oberlausitz: 60 Biografien aus Bautzen, Bischofswerda und Umgebung by Frank and Uwe Fiedler. I suppose some or parts of the Sunday services (the sermon?) in Klix must have been in Sorbian, with the local clergy so active in Sorbian language activism. And of course the local princiary lord of the manor's family attended, including Auguste.
One can wonder how much Sorbian Grand Duchess Auguste had heard / knew and how much reminicences of her Slavic home she told her daughter, the future Russian grand duchess, during the 7 years of her daughter's life that she lived.
