He was married to actress and singer Celine Evangelista from 2016 until 2021.

Umboh was born in the United States and moved to Indonesia at the age of six.

William married actress and singer Celine Evangelista [id] on 10 November 2016.

In 2011, William began singing with the band The Junas Monkey, which also included actors Ajun Perwira on guitar, Aditya Suryo on drums, and Bobie Antonio on bass.

They released several singles and a self-titled EP, before going on an extended hiatus.