With whom did Peter stay for many days in Joppa?

Answer: Simon the tanner

Peter stayed in Joppa with a tanner named Simon, whose house was by the sea.

“And Peter stayed for several days in Joppa with a tanner named Simon. Now send men to Joppa to call for a man named Simon who is called Peter. He is staying with Simon the tanner, whose house is by the sea.””— Acts 9:43, 10:5-6 (BSB)