In the world of computing, the letter $wp$ has faced a string of inappropriate names, with “Weierstrass p” being a prime example. The ISO-8879 standard in 1986 seems to have sparked this confusion. The Unicode coding assigned the lowercase script “p” a capital status, leading to a formal correction in Technical Note #27. Despite this correction, the symbol continues to be referred to as “script capital p” or “Weierstrass elliptic function” in Unicode. The term “Weierstrass p” remains prevalent in older HTML specifications and Microsoft documents, perpetuating the confusion around this symbol.
https://mathoverflow.net/questions/278130/the-letter-wp-name-origin