Herman Isaachsen Willoch (27 June 1892 – 11 February 1968) was a Norwegian painter.
He was born in Alversund[1][2] as the son of vicar Christian Abel Isaachsen, a grandson of Isaach Isaachsen.
[3] The family eventually moved to Uranienborg, Oslo.
[4] He studied under Pola Gauguin at the Norwegian National Academy of Fine Arts.
He worked mainly with frescoes, decorating the city hall in Sandvika.