Names
Järvekalda (Järvekallas)
Lakeside. The lake in question being Harku järv. And the town in question is not Tallinn, but Harku vald, a parish with one border alongside the lake and looks like it’s been gerrymandered.
Järveotsa (Järveots) 
Lake’s end. Possibly a synonym of järvesopp, see Sopi.
Järvevana (Järvevana)
Old man of the lake, Old Man Lake, another nickname for Ülemiste Vanake (the little old man of Ülemiste), a mythological character who lives there. See also Hallivanamehe. This street is part of the E67 from Helsinki to Prague.
Joa (Juga)
Waterfall, cascade. Referring to the 3.8-m high Hundikuristiku cascade in Kadrioru. Interesting anagram, a joa (possibly related to jõgi, see Jõe) is the sort of thing you might find at either end of an Oja.
Jõe (Jõgi)
River, the river in question being the Härjapea which went through the standard slippery slope of many an urban river, with names to-ing and fro-ing between river and canal according to mindset of the day: Canalstraße (1881, first record), Härjapea-jõe tn, Alam-Jõe tn (lower river), Bachstraße (stream), Kanalstraße, Канальная ул (canal). In the mid-thirties, mains were laid, the water was diverted, and the bed filled in. The Soviet occupation saw a major change, switching (1974-1990), along with Pronksi and Liivalaia (1944-1972), to Kingissepa V.. Present name dates to 1990. To drink in Estonian is jooma to which the word is clearly related, both suggested from a common FU root, *juga, which may be related to a Turkic *jug- for ‘to swallow’ or Proto-Mongolic *uxu-, Mod. Mong. уух (uux), ‘to drink’.
