Jonathan Chua (Chinese name 蔡堅信), is the guitarist, vocalist and founding member of the band The Sam Willows and was born February 13, 1990, in Singapore.

He graduated from Nanyang Technological University as a Sociology major. In 2015, he started his own recording studio and design company called Zendyll Productions.

In 2018, he married Astro SuperSport TV presenter Amanda Chaang, proposing to her on the rooftop during sunset in New York City and they own a miniature Dachshund by the name of Chili.