His siblings were the renowned Finnish philosopher Lilli Alanen and Johan Gullichsen, a professor of engineering. Kristian Gullichsen had three sons and two daughters, one of the sons was the artist Alvar Gullichsen (born 1961).
Kristian Gullichsen had three sons and two daughters, including the artist Alvar Gullichsen, born in 1961. His siblings were Lilli Alanen, a renowned Finnish philosopher, and Johan Gullichsen, a professor of engineering.