John Buckup's family background is marked by his parents, Hans Buckup, born in 1902, and his mother, Kitty. He has a sibling, a brother named Achim, born in 1931, and a sister named Ursula, born in 1934. His ancestry is a blend of German and English heritage.
In his educational pursuits, John studied Law, laying the foundation for his future endeavors.
John's personal life is filled with joy and love. He shares his life with actress Eva Wilma, and together they have two children, Vivien, born in 1956, and John Herbert Junior, born in 1958. Vivien has pursued a career in cinema direction and has two sons, Miguel and Mateus. John Junior, on the other hand, is a musician and has three children: Gabriela, Francisco, and Vitorio.
In 1978, John Herbert married Claudia Librach, and they have been together ever since. Their union has been blessed with two sons, Ricardo, born in 1979, and Eduardo, born in 1983.