Your question needs to be more specific about who exactly you are asking about.
No, Kurt Vonnegut did not have any pen names. He wrote under his own name for all of his published works.
Shakespeare had no pen names.
Pen names are used by individual authors to publish their works anonymously or under a different identity. You cannot buy a pen name like "Souffle" as it is a creative alias chosen by an author for their personal use and branding.
Jacinto Zamora, the Filipino martyr and one of the Gomburza priests, did not widely use pen names in his writings. However, he is often associated with the pen name "J. Zamora" in some of his works. His contributions were primarily in the context of advocating for reforms in the Philippines during Spanish colonial rule, and he is remembered for his role in the fight for justice and equality.
José Rizal, the Philippine national hero, used several pen names throughout his literary career. The most notable among them are "Laong Laan," which means "ever prepared," and "Dimasalang," meaning "untouchable." He also wrote under the name "P. Jacinto" in some works. These pen names allowed him to express his thoughts and critiques of colonial rule while maintaining a level of anonymity.
It was the Pluma.
Your question sounds like your trying to get an answer for the patriots pen competition.
Jose Rizal wrote under the pen names Laong Laan and Dimasalang. He used pen names because he wrote many revolutionary writings that he did not want to be associated with him for fear of retribution.
pepe
those who helped the Holocaust were called Nazis, but they were not Heroes.
Shakespeare's pen.
The names of two national heroes of Spain are El Cid and Alonso Perez de Guzman. El Cid's full names were Rodrigo Diaz Vivar and is among the most famous heroes in Spain.