A word θαΐς (thaïs) meaning "bandage" certainly existed in ancient Greek: http://www.perseus.tufts.edu/hopper/resolveform?type=start&lookup=qai&lang=greek (in English). Interestingly, Pavlos' old website mentions that the name Thaïs is derived from θεὰ (thea) meaning "goddess": http://web.archive.org/web/20120324121243/http://www.etymologica.com/page11.htm (in English).Also, you might want to consider removing saint Thaïs of Alexandria from the description of this entry, because she was a Copt whose original name was Ⲧⲁⲏⲥⲉ. It was hellenized to Ταησις (Taesis, which is Taisis in modern Greek) but due to the similarities with the authentic Greek name Θαΐς (Thaïs), the two names were often confused with each other and the saint eventually became known as Thaïs (at least in the English-speaking world). For more information, see the long comment that I left at the entry for Taisiya: https://www.behindthename.com/name/taisiya/comments.
Also, you might want to consider removing saint Thaïs of Alexandria from the description of this entry, because she was a Copt whose original name was Ⲧⲁⲏⲥⲉ. It was hellenized to Ταησις (Taesis, which is Taisis in modern Greek) but due to the similarities with the authentic Greek name Θαΐς (Thaïs), the two names were often confused with each other and the saint eventually became known as Thaïs (at least in the English-speaking world). For more information, see the long comment that I left at the entry for Taisiya: https://www.behindthename.com/name/taisiya/comments.