Through his sister Helga Johanne Arentz Nissen he was a brother - in - law of Johan Johannson and uncle of Johan and Ole Hartvig Nissen Johannson .
He was a great - grandson of Martinus Nissen and Erik Andreas Colban , and brother of Per Schjelderup Nissen .
Through great - grandson 's sister Helga Johanne Arentz Nissen he was a brother - in - law of Johan Johannson and uncle of Johan and Ole Hartvig Nissen Johannson .
He was a great - grandson of Martinus Nissen and Erik Andreas Colban , and brother of Per Schjelderup Nissen .