On March 19, 1775, he married in the Holy Cross Church in Warsaw, Anna née Baudouin. They had five children: Apolonia, Antoni, Józef, Roman and Stanisław. Around 1777 Kluczewski family moved to Parfimowce in the Wielka Brzostowica parish. He built there a classicist manor house. With time Kluczewski family built another manor house in the neighbouring Żebry villiage. Wielka Brzostowica parish together with the manor houses in Parchimowce and Żebry served as the family nest of the descendants of Ignacy Kluczewski until 1939 when World War II broke out and the lands were incorporated into the Soviet Union.