Thaisa is from the Greek Thaís — possibly meaning bandage or beholder. Thaisa in Shakespeare's Pericles, Prince of Tyre (c. 1607-1608) — beloved daughter of King Simonides of Pentapolis; wife of Pericles; mother of Marina; one of the most-celebrated Shakespearean romance heroines; her apparent death at sea, miraculous resurrection by Cerimon, and eventual reunion with her family form one of the iconic romance plot structures in late Shakespeare; the play has been performed continuously since the 17th century and adapted into operas by Telemann, Tippett, and others. Thaïs (the Athenian hetaira, c.
Thaisa does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Thaisa reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.