Michael from the kindred Kacsics was a Hungarian distinguished nobleman from the gens Kacsics (Kačić). His parents' identity is unknown. His only brother was Simon Kacsics, ban of Slavonia in 1212. Michael had two sons, Leustach, ancestor of the Zagyvafői family, and Falkos, the first member of the Falkos branch and grandfather of Thomas Szécsényi. Through Falkos, Michael was forefather of the Szécsényi, Farkas de Szeszárma, Tompos de Libercse, Radó de Libercse and Geréb de Vingárt families.