Kateřina was born on June 24th, 1683 in Hlinné, Dobruška. Kateřina's father was Jan Mojžíš and her mother was Marie Netíková. Her paternal grandparents were Mojžíš and <Unknown>. She had three brothers and four sisters, named Jan, Vít, Jan, Magdalena, Marie, Dorota and Rozina. She was the fourth oldest of the eight children.