Khan Asifur Rahman Agoon, known as Agun (born 1971) is a Bangladeshi musician. The son of actor Khan Ataur Rahman (d. 1997) and singer Nilufar Yasmin (d. 2003), he is notable for songs like "Baba Bole Chhele Nam Korbe", "Amar Shopno Gulo" and "O Amar Bondhu Go".
In 1988, Khan Asifur Rahman Agoon started his career in music as the vocalist of a band named Sudden and released an album titled "Auchena", two years later in 1990. He retired from the band and went solo in 1992. Since then, he performed as playback singer in films including Keyamot Theke Keyamot (1993) and Dui Duari (2000).
Agoon also played roles in films like Akhono Onek Raat, '71 Er Ma Jononi and television dramas including Ojana Shoikotey and Ronger Manush.
One month after his father's death in 1998, Khan eloped and married Farhana Tanna. The couple had been in love since childhood. Tanna's maternal uncle was married to Khan's maternal aunt, Sabina Yasmin. The couple has two children: Khan Yaqeen Rahman (Michhil), born in 2000, and Khan Yazan Rahman (Moshal), born in 2009. Nilufar Yasmin chose Michhil's legal name: Khan Yakin Rahman.