Erik Heinrich's grandfather, the
ironmaster Anders Heinrichs, was of Swedish descent and originally bore the name Henriksson. The family came to Finland in 1849. Heinrich's parents were Axel Ossian Andreas Heinrichs and Johanna (Hanna) Matilda Rönnholm. Heinrichs was also a praised author of which his book on
Gustaf Mannerheim is considered his best. He was made an honorary doctor at
University of Helsinki in 1957. Heinrichs married Maria Emma Augusta Paulig, daughter of , in 1921. == Bibliography ==