Tirdi (Tirt)
Grasshopper. This could also be the common-or-garden cicada, which sings so sweetly in the suburbs but could equally be any leafhopper, treehopper or spittlebug. Insect, plant and bird names can be extremely variable and fuzzy. Trust me on this.
Tohu (1] Toht; 2] Tohk; 3] Tohu)
1] Birch bark; 2] Stern of small boat; and 3] Mist, haze. The earliest-known written document in Finno-Ugric – Tohtkiri (birch bark letter) No.292 – was carved on birch bark in the first half of the 13th C in a dialect of the Olonets Karelia region. Although its meaning is far from clear (jumolanuliinimiži | nulisě[x]anoliomobu | [xu]molasudьnipoxov[i], QED), it seems to involve God and arrows, and may well be an incantation or ‘thunder spell’; Tohtkiri No.403, incidentally, has been said to be a “Finnic-Slavic business travellers’ lexicon” although with only six words cheat-sheet may be a better description. Street forms a loop off Kase, so 1] is the most likely.
Tõllu (Tõll)
Earlier or alternative name of Suur-Tõll (Big Tõll), legendary beer-drinking and cabbage-consuming giant who lived on the island of Saaremaa and spent much of his time throwing rocks at people, notably Vanatühi, Lord of the Underworld, literally ‘Old Empty’ (but perhaps with a side-hint of everlasting greed, covetousness or soul-bulimia, see kõht on tühi in Intro) although sometimes translated as ‘useless old bugger’. Parallel to Leigeri, his brother on Hiiumaa.