He had four older brothers; S.J.C.Kadirgamar Jr., QC who became an eminent lawyer in commercial law; Rear Admiral Rajan Kadiragamar who became the head of the Royal Ceylon Navy and Major Selvanathan "Bai" Kadirgamar of the Ceylon Artillery, Thirumalan "Mana" Kadirgamar a planter who died in a motor bike accident very young.