| Herman Petersen | |
| Birth Date: | 1713 12, df=yes |
| Birth Place: | Gothenburg, Sweden |
| Death Place: | Stockholm, Sweden |
| Nationality: | Swedish |
| Occupation: | Merchant |
| Parents: | Abraham Petersen Christina Tham |
Herman Petersen (13 December 171313 August 1765) was a Swedish merchant and director of the Swedish East India Company, amassed significant wealth through copper trade with France.
Herman Petersen was born on December 13, 1713, to Abraham Petersen, a wholesaler in Gothenburg, and his wife Christina Tham, a member of the Tham family. His grandfather had migrated from Stettin, Prussia, to Stockholm, and subsequently, his father relocated to Gothenburg.
Petersen was elected to serve as director of the Swedish East India Company for a period during the 18th century. Additionally, Petersen traded great amounts of copper with France. He did so with his company Petersen & Bedoire, that he had started with his brother-in-law, Fredrik Bedoire. Petersen was a member of the so called 'Skeppsbroadel'.
Petersen possessed Erstavik, a castle-like structure located in Nacka, as well as the Petersen House, built in the Dutch Baroque architectural style, in Gamla stan. In 1746, Petersen acquired Stora Nyckelviken by Saltsjön, where he built a summer residence. The property is now located in Nacka Municipality and is a nature reserve.
After his death, the properties were established as a fideicommissum.
In the year 1741, he entered into matrimony with Magdalena Bedoire, and in 1753, he espoused her cousin, Charlotta Bedoire. Both were members of the Bedoire family, tracing their ancestry to the French Huguenots. The familial unions resulted in the birth of five offspring. A nobiliary particle, denoted as "af," was appended to their familial surname. Herman Magnus af Petersens was his 2nd great-grandson.
The af Petersens family gained official recognition within the Swedish House of Nobility in Stockholm, assigned the number 2071. Additionally, this noble lineage was acknowledged in Helsinki in 1810, bearing the identifier of number 166.
The final resting place of Petersen, is situated at the Maria Magdalena Church on Södermalm.