Alexander was born in 1876 in
Newtownards, Ulster, Ireland. His father was Robert Alexander of
Belfast. He received his education at
Methodist College Belfast and, after he emigrated to New Zealand, at
Prince Albert College in
Auckland. His wife was a cousin of
Nellie Melba (their mothers were sisters), the Australian
operatic soprano based in Europe who had an international career. On her tours in New Zealand, she would stay with the Alexanders when in Auckland. The Alexanders lived at
Devonport and their house burned down at the end of 1913. He was admitted to the
Supreme Court in Auckland in 1899 as a solicitor and three years later, he became a barrister. From 1923 to 1925, he was the president of the Auckland Law Society. ==Community service==