Nepomuceno was born on July 8, 1948, to Leonardo and Paquita Nepomuceno.[3]
In 2014, Nepomuceno's then 16-year-old grandson Sean Gabriel was shot and injured in Marikina.[4]
In 2016, Nepomuceno suffered a stroke that left him debilitated for two years, but recovered following constant therapy.[5]
Nepomuceno died on July 26, 2023, at the age of 75.[6] He had been hospitalised at the Marikina Valley Medical Center in Marikina after suffering head injuries following a fall from his bed on July 24.[7]
^ ab"Snap Revolution". Manila Standard. Standard Publications, Inc. April 11, 1987. p. 13. Retrieved January 19, 2021. His debut longplaying album, Willie's Way, won the prestigious Cecil Awards for the best comedy album in 1985.