Erling Sven Lorentzen was a Norwegian shipowner and industrialist. He founded Aracruz Celulose in 1968. He was the widower of Princess Ragnhild, the eldest child of King Olav V of Norway. In addition to being a Norwegian princess, his wife was in the line of succession to the British throne and occupied the 18th place at the time of her birth. Erling Lorentzen was a member of the Lorentzen family of shipping magnates.

Princess Ragnhild, Mrs Lorentzen, was the eldest child of King Olav V of Norway and Princess Märtha of Sweden. She was the older sister of King Harald V and Princess Astrid. She was the first Norwegian royal to have been born in Norway since the Middle Ages. In 1953 she married the industrialist Erling Lorentzen, a member of the Lorentzen family of shipping magnates. In the same year they moved to Brazil, where her husband was an industrialist and a main owner of Aracruz Celulose. She lived in Brazil until her death 59 years later.