Gertrude Lachner, also known as Froben or Herwagen, (d. circa 1559–1560 in Basel) was a Swiss humanist and publisher close to Erasmus.

[3] After Froben's death, she married Johann Herwagen around 1528, with whom she was already collaborating and who was close to her late husband.

[4][5] This allowed them to merge their presses and increase the frequency, quantity, and quality of their productions, now bearing both names, Froben-Herwagen.

[4] In 1538, the family was scandalized after Herwagen seduced Katherina Weckart, the wife of Erasmus Froben, who left him.

[3] Although he continued his activities and managed to return to Basel, this significantly slowed down his publishing endeavors and caused lasting divisions within the family.