Ignatius Joseph Kasimo Hendrowahyono (10 April 1900 – 1 August 1986) was an Indonesian politician and national hero.

His father, Ronosentiko, was a Yogyakarta palace soldier, serving the Mentrijero brigade at the time.

[3] Owing to his father's prestigious position in that era, Hendrowahyono was able to attend school in the Dutch East Indies.

Later on, he entered a teaching college in Muntilan, where he was introduced to Catholicism by the school's founder, Romo (Father) van Lith.

Within the same time period, Hendrowahyono also started the process of consolidating several Catholic political parties in Indonesia into one entity: the Indonesian Catholic Party (Indonesian: Partai Katolik Republik Indonesia).