Tam (Celt.), 'still,' 'smooth;' as the Thamesis ('smooth Isis'), the Tema, Tame, Tamar, Tay.
Thing (Scand.), 'a legislative assembly,' also 'the place where it is held;' as in Dingwall, Tinwald, Tynwald Hill, Tain.
Thorpe (Norse), Dorf (Ger.), Dorp (Dut.), 'a village;' as Burnham-Thorpe, Heythorpe, Düsseldorf, Middledorp.
Thwaite (Scand.), 'a clearing;' as Crossthwaite.
Tobar (Gael.), 'a fountain;' as Tobermory.
Toft (Dan.), 'an enclosure;' as Lowestoft, Ivetot.
Ton (A.S.), 'enclosure,' 'town;' the most common of English local suffixes.
Tor (Celt.), 'a tower-like rock;' as Torbay, Torphichen, Turriff, Torbolton, Kintore, Torridon. [From L. turris, 'a tower,' and its derivatives are Torres-Novas and Torres-Vedras in Portugal, Truxillo in Spain, Tourcoing in France.]
Tre (W.), 'a dwelling;' as Tretown, Coventry ('convent dwelling'), Oswestry, Uchiltre.
Uchel (W.), 'high;' Uachter (Gael.), 'a height;' as the Ochil Hills, Ochiltree, Auchterarder.