Ingela Gathenhielm was born in Onsala as the daughter of the shipowner Olof Hammar and Gunilla Mårtensdotter. In 1711, Ingela married Lars Gathenhielm. Ingela and Lars lived on adjacent farms as children and met at a young age. They had five children together, of which only one, the son Anders (1714–1768), survived to adulthood. After their wedding, they settled in Gothenburg.
In 1710, Lars Gathenhielm was granted royal permission to attack and plunder ships from all nations belonging to the enemy of Sweden during the Great Nordic War. Reportedly, in practice he did in fact attack ships from non-enemy nations as well, making the activity illegal piracy. The spoils were sold in Dunkerque (or Dunkirk) in northern France. Lars made a fortune, inducted to the Gothenburg city guild in 1715 and ennobled, alongside his brother Christian, for his service to the crown.
Many stories and legends have been told about Ingela Gathenhielm. She's reported to of been deeply involved in the seafarings of Lars as his business companion, adviser, and the mastermind behind many of his affairs. She was also a privateer herself, which wasn't odd in 18th-century Sweden, where married women were expected to assist their husband's in business. What's confirmed is that when Lars died in 1718, Ingela inherited his royal privateering permit and continued to manage his fleet (and his alleged pirate empire). This wouldn't have been regarded as controversial for the standards of that time, when widows by law inherited the business of their late spouse, even if the business, in this case, was unconventional; her contemporary Margareta von Ascheberg also inherited a war office in the same war. She was called the Kapardrottningen or the 'Shipping Queen'.
The Swedish privateering licenses were retracted after the peace treaty between Denmark in 1720 and Russia in 1721. After the Peace, Ingela issued several lengthy lawsuits against the Crown for monetary compensation for the costs she had as a privateer in the service of the crown, which did in fact give her military status of a kind; this continued until after her death and was inherited by her second spouse.
Aside from her activity as a privateer, Ingela managed several other businesses in Gothenburg. She inherited the ropewalk factory and the shipping business from her spouse. She expanded it by founding many other businesses such as a bakery, forge, distillery and Sailmaker factory. Becoming successful in these businesses, particularly the ropewalk factory, which reportedly equipped a large part of the ships of Gothenburg.
In 1722, Ingela married the colonel lieutenant Isak Browald. In 1729, she was buried alongside her first husband in Onsala, Sweden, beneath the tower of the church.
A street in Västra Frölunda is named after her: Ingela Gathenhielms gata ('Ingela Gathenhielm Street').
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