High Quality Content by WIKIPEDIA articles! Pac (Lithuanian: Pacas) was one of the most influential noble families in the Grand Duchy of Lithuania during the era of the Polish-Lithuanian Commonwealth. Numerous high ranking officials of the Commonwealth came from their ranks. Their coat of arms was Gozdawa.The family reached the height of its influence during the second half of the 17th century. Their lands were located mainly in Hrodna and Lida.