[1] Petrides was born in Sydenham, London, the third son of Greek merchant Demetrius Nicetas Petrides (born in Symi, Ottoman Greece)[2] and Ellen Bannerman of Hackney.
[3] He was educated in Dulwich and Brussels before being called to the bar at the Middle Temple in 1906.
[1] After a decade practising at the Common Law Bar, Petrides was appointed Crown Prosecutor in the Seychelles, where he acted as Chief Justice in 1916–17 and 1918–19.
He served on the Supreme Court of Nigeria from 1926 to 1930, was Chief Justice of Mauritius from 1930 to 1936, and finally Chief Justice of the Gold Coast Colony from 1936 until 1944, when he retired and returned to England.
They had one son, Felix Bannerman Petrides, and one daughter, Pamela Rachel, who married Capt.