Niels Olsen was born about 1644, in Bornholm, Denmark. He married Signe Nielsdatter about 1667. They were the parents of at least 2 sons and 3 daughters. He died in 1723, in Hasle, Bornholm, Denmark, at the age of 79, and was buried in Hasle, Bornholm, Denmark.
The Royal Danish Naval Academy was established in 1701 to educate then commission all officers into the Royal Danish Navy. It is the oldest, still-existing, officers' academy in the world.
1713 · Royal Danish Military Academy
The Royal Danish Military Academy educated and commissioned all officers for the Royal Danish Army. The Military Academy function was initiated in 1713 by request of King Frederick IV on inspiration from the Naval Academy.
1 Danish and Norwegian: patronymic from the personal name Olaf, Olav (Old Norse Óláfr, Ólafr, variant Óleifr, earlier Anleifr, from proto-Scandinavian elements meaning ‘ancestor’ + ‘heir’, ‘descendant’). Olaf has always been one of the most common Scandinavian names; it continued to be popular in the Middle Ages, in part as a result of the fame of St. Olaf, King of Norway, who brought Christianity to his country c.1030 . This surname, the second most common in Norway, is also established in England, notably in the Newcastle upon Tyne area.2 German (Ölsen): habitational name from any of several places so named, in Saxony, Brandenburg, and the Rhineland.