Sam J. C. Kadirgamar Jr., QC was an eminent Sri Lankan lawyer. Kadiragamar came from a Tamil Protestant Vellala family with deep roots in Jaffna, his father was Samuel J.C.Kadirgamar Sr, JP, UM a Proctor, who was the President of the Colombo Proctor's Association and the founder President of the Law Society of Ceylon. He was the oldest in a family of five brothers. His brothers where Rear Admiral Rajan Kadiragamar, former Captain of the Royal Ceylon Navy; Major Selvanathan "Bai" Kadirgamar of the Ceylon Army, Thirumalan "Mana" Kadirgamar, and the youngest Lakshman Kadirgamar, PC former Minister of Foreign Affairs.