Johanna Juliana Josefa Lohm née Pechlin von Löwenbach (25 July 1747 – 8 February 1834) was a Swedish Baroness and educator.
She was the founder and principal of a Girls' School in Stockholm which was active for about fifty years, until her death, and long counted as the most fashionable of its kind during the reign of Gustav III of Sweden.
Having what was described as a brilliant education herself, a reputation for great learning, and a wide net of contacts in high society, she founded a pension or a finishing school for girls from the upper classes in Stockholm.
For about fifteen years, this was regarded as the finest school for girls in the capital and popular among the upper classes.
Her daughter, known for her pride, supported herself by making ornaments for shops and died homeless as a Stockholm original.