According to Catholicism, who is the leader of devils?

We come across many verses in the Bible - both Old Testament and New Testament, where the name of devil is mentioned. For instance: - Is 14: 12: How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! - Lk 10:18 : And he said unto them, I beheld Satan as lightning fall from heaven - Mat 4:10 : Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve. - Lk 11: 15: But some of them said, He casteth out devils through Beelzebub the chief of the devils. Satan appears to be a generic name in that Jesus himself reprimands Peter: > "But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offence unto me: for thou savourest not the things that be of God, but those that be of men." (Mtt 16:23) My question, therefore is: Who, according to Catholic Church, is the leader of all devils?