Jack (Willem) de Nijs, artist name Jack Jersey, was a Dutch singer, composer, arranger, lyricist and record producer of light music who worked for national and international artists. He had his own production company, J.R. (Jeetzi-Rah) which means "Creation" / "Creational world" in Hebrew. He discovered artists such as André Moss, Nick MacKenzie and Frank & Mirella. During his life, Jack de Nijs and the artists he represented were good for selling more than twenty million records.

Cimahi is a landlocked city located immediately west of the larger city of Bandung, in West Java Province, Indonesia and within the Bandung Metropolitan Area. It covers an area of 42.43 km2 and had a population at the 2010 Census of 541,177 and at the 2020 Census of 568,400; the official estimate as at mid 2023 was 590,782. The city is a major textile producer, and is home to several military training centres.