Khalaf is an Arabic-origin name meaning 'eternal', derived from the word 'khalid' for 'forever'. It's one of the 96 names of God in Islamic tradition and appears in the Quran, emphasizing Allah's eternal nature. Historically, it was borne by notable Islamic figures like Abu Hafs Umar ibn al-Khalaf, a companion of Prophet Muhammad. Today, Khalaf remains popular among Muslims worldwide due to its profound meaning of 'everlasting'.