Dragutin Wolf (1866–1927) was a Croatian Jewish industrialist and founder of the food company Koestlin in Bjelovar. Wolf was born in Bjelovar to a Jewish family. With his wife Irma Wolf he had two sons, Slavko and Otto. Wolf owned a small bakery for bread and cakes in Bjelovar which was founded on November 11, 1892. One decade later, Wolf started to focus on the production of baked goods with a prolonged shelf life. In 1905 he founded the food company "Tvornica keksa, dvopeka, biskvita i finih poslastica Dragutina Wolfa i sinova" (Factory of biscuits, rusks and delicious pastries Dragutin Wolf and sons) specialized in the confectionery products. Factory was placed in Šenoa street near Wolf family villa. In 1921 company began to produce biscuits and wafers. Wolf lead the business with his s