Why Wanda's father wrote the that she and Jack are not going to school anymore. What was funny about Wanda's name was?

Dear Student,
Wanda's father Mr. Petronski wrote in his letter that Wanda and her brother Jake would be moving to a big city for which they would not go to school anymore. 
Wanda's name seemed an unfamiliar Polish, lengthy and funny name to the fellow students in her school.

hope this helps.

Regards