Jerwin Juntilla Ancajas (born 1 January 1992) is a Filipino professional boxer.
He has held the IBF junior bantamweight title since September 2016.
As of October 2019, he is ranked as the world’s fifth-best junior bantamweight by the Transnational Boxing Rankings Board, and sixth by The Ring magazine and BoxRec.Jerwin was born and raised in Panabo, a suburb of Davao City, Philippines.
He was introduced to boxing in the second grade bhis brother, Jesar.
Jerwin would go on to win several national championships, including a gold medal at the Palarong Pambansa, before turning pro in 2009, at the age of 17.
Jerwin Ancajas has a 90-5 record in the Amateur Boxing.