Little or no authority resides in the vagaries of ancient spelling and still less has survived the ignorance of alleged copyists of old records. Each church or civil clerk was a law unto himself, and this self-made law was not akin to those of the Medes and Persians, for it continually altered. Sometimes in one entry the same name will be spelled in two and even three distinct ways.

The name Tietsoort under various spellings appears as: Dietsoordt, Dietsoor, Ditsoort, Ditzoort, Ditchious (?), Dizo, Hiesoor, Pezard, Teachout, Telfoot, Tetsoort, Teso, Tetzo, Tezzo, Thouyswoint (?), Tietshoom, Thitis, Tichort, Tichout, Tietsoord, Titscoot, Titcot, Tietsoort, Tieksoort, Tietzoort, Tiedsoort, Tietshout, Tutsco (?), Tietsoo, Tieshood, Tiesoort, Titscout, Titzer, Tisso, Tissot, Tizzo, Tizoor, Tjietsoord, Tjetsoort, Tyloort, Titort, Titsworf, Titsworth, Teehore, Titchsord.

These variations illustrate the difficulty experienced in indexing old names and in using an index when prepared by one ignorant of all these different forms of the same name.

The name, modernly, sometimes appears as Tietsoort, but more frequently as Titsworth, Titzer and Teachout. In New Jersey and along the Delaware Valley and in Orange Co, NY it is Titsworth. In Saratoga Co., NY, it is Tichout.

"Oort" in Dutch and German means "place." A Friesian scholar says "Tietsoort" means "Tiete's Place," or the place or region(?) of Tietes.