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Elektroni (Elektron)
Electron. Parallel to Energia.
Energia (Energia)
Energy. After another Eesti Energia electricity substation. Parallel to Elektroni.
Järve (Järv) 
Lake. The one in question being Ülemiste. Relationships unclear. Most FU languages have very similar cognates for lake: Finnish järvi, Livonian jōra, Sami jávri, etc., but järv could well be an early loan from Proto-Baltic *jaur-, a root involving liquids such as Lithuanian jauris (swamp) and jūra (sea), cognates with Albanian hurdë (pond), and Armenian ջուր (ǰur, water), and even English urine, itself cognate with Latin urinare (to dive). Aren’t we lucky!
Haki (Hakk)
Jackdaw, aka western, Eurasian or European jackdaw, Coloeus monedula. The English name is made up of jack, for something small, and daw, dating back to Old English dawe, rarely used nowadays, but related to Old Welsh dub, Old Cornish duw, and Breton dū́, all meaning black, and in turn to Old Prussian doacke for starling. The scientific or ‘Latin’ name is derived in part from Anc. Gk. κολοιός (koloiós), meaning jackdaw and actual Latin monedula, also meaning jackdaw, but related too to moneta (coin) for their numismophilic tendencies. A hakk is also a shock / stook of grain sheaves topped by one or more larger ones acting as parasol/umbrella, possibly a slightly smaller version of Nabra, or a stack or pile of arms (weapons). Part of the Lilleküla bird-name group of streets. See also Hane.
