Jan Jakub Twardowski (1 June 1915 – 18 January 2006) was a Polish poet and Catholic priest.
Several weeks after his birth, due to the events of World War I, his family moved to Russia After 3 years, they returned to Warsaw.
During World War II he took part in various operations organised by the Armia Krajowa and fought in the Warsaw Uprising.
His writings were published in a popular Polish Catholic magazine, Tygodnik Powszechny.
He gained fame in 1960 after publishing his first poetry book, "Znak Ufności" ("The Sign of Trust").