Dr. Adrian (originally Adrien) Hartog (1893-1968) was a member of the Order of the Crown of Thorns.

He was born in Rotterdam and, moving to the United States, established an import business. He was appointed Vice-Consul and then Consul General for the Netherlands in Los Angeles, California, retiring in 1961 and being knighted by Queen Juliana. He married, as her second husband, the former Claude Telmera Brooks, who survived him.

In 1957, Hartog composed the music to a Centennial Hymn for the Christian Reformed Church, a Dutch Reformed body that was a focus for the Dutch-American community. He received an honorary doctorate from the University of Southern California in 1932.