 Daukša's son Pac is considered the first member of the family; his ancestors took his first name as their family name, beginning with his son Jerzy Pac (d. 1505/6).Their lands were concentrated in the southern Lithuania propria, around the county of Jieznas.The family sponsored the construction of several notable examples of Baroque architecture in Lithuania; the most significant of these, St Peter and St Paul's Church in Vilnius and the Monastery of Pažaislis, were commissioned by family members.