Premise: Carl Andreas Koefoed (known in Russian as Андре́й Андре́евич Кофо́д , "Andrey Andreyevich Kofod"; 16 October 1855, Skanderborg, Denmark – 7 February 1948, Copenhagen) was a Danish agronomist active in the Russian Empire in the early 20th century. He was the brother of Danish chemist Emil Koefoed.
Hypothesis: Emil Koefoed was not an only child.