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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.

Rav-Negad is a military rank in the Israeli army (chief warrant officer). See http://www.rankinsignia.info/show.php?podkategorie=Tzava+-+Army&stat=Israel&id=410 And Jhos is an Israeli first name. Is that just a coincidence?

Jufuf and Jafuf are East-European first names. I get the impression they are variants of Yusuf (Joseph). Haji or Hadji is a Muslim honorific reserved for those who have made the 'Haj' or pilgrimage to Mecca. In practice it often became like a second surname. So if the final -ic means 'son of' we get 'son of Jufufce-who-made-the-pilgrimage. Unfortunately, I can find no evidence that a surname like Jufufce actually exists...

No real clue ...but that's never stopped me from trying ...

Jhosravinegad ...maybe a Joseph or Joshua ...from a wineland ... maybe -gad comes from gard ...

Jukneviviene ...there's an Estonian first name Juku which is a form of Richard ...viviene ...looks possibly like a combo of 'vita' - life and viene - maybe venir - to come ...

Jufufcehajic ...certainly Slavic with that ending ...which I believe denotes a diminutive? (Can anyone confirm?) Maybe a form of Geoffrey ...or maybe the Hebrew name Jedidah ...'friend of God' ...

Just a shot in the dark ...

Phone books sometimes include imaginary names as a means of copyright protection (if another phone book also contains it, it shows they used the first as a source). I suggest you try calling them.