1st Non-Muslim Chief Justice of Pakistan was:

Justice Alvin Robert Cornelius, commonly referred to as A.R. Cornelius, made history in Pakistan as a non-Muslim Chief Justice, a first in the nation’s history. He served as the fourth Chief Justice between 1960 and 1968. Justice Cornelius, a Christian, played a significant role in the development of the nation’s legal system and was a prominent personality in the country’s judicial system.