- Born
- Birth nameJohn David Yeisuke Helfrich
- Jack Helfrich was born on January 9, 2000 in Denver, Colorado. Jack is a composer, known for Jack and Emi Helfrich feat. David Valentine: Silver City (2021).
- Parents
- RelativesEmi Helfrich(Sibling)Yoko Ono(Grandparent)Sean Lennon(Aunt or Uncle)Anthony Cox(Grandparent)
- He is of Japanese descent trough his mother side, his maternal grandmother is Japanese artist Yoko Ono.
- His birth name is John although he is known as Jack; he is named after his father Jim Helfrich's father John (although his mother Kyoko Ono Cox's step-father was also named John, because he was musician and activist John Lennon).
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