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It looks like Jukneviviene is mistake for Jukneviciene. I don't know its meaning, but the Jukn- element can also be found in Jukniene, Jukna, Juknis / Juknys (also Yuknis in the USA), and Juknius. It appears that first the -evic ending was added to this, (Juknevic also exists) and subsequently the -iene ending (it is also found in Petrokiene, Baravykiene, Guziene).
All these names are Lithuanian.