He was born in Comber, County Down, second son of John Andrews, a wealthy flax spinner, and Sarah, daughter of William and Sarah Drennan; his elder brother Thomas, the father of three eminent sons, inherited the family business. William was educated at the University of Dublin and the Middle Temple. He was called to the Irish Bar in 1855, Queen's Counsel in 1872. He married Elizabeth Galloway of Monkstown, County Dublin in 1857; she died in 1901. They had no children. He practiced mainly on the North-Eastern Circuit, where his skill in persuading juries of the merits of his client's case became renowned. Maurice Healy quotes the remark: "Once Andrews has stated his client's case to the jury, the only uncertain thing is how great the award of damages will be". He was appointed to the High Court of Justice in Ireland in 1882, first to the Exchequer Division and on its abolition in 1897 to the King's Bench Division. He was the Probate Judge for many years, and Healy praises his efficiency in dealing with probate cases - "dealing out the orders like a pack of cards". In criminal cases he was known for his scrupulous fairness in summing up, but also for his exceptionally severe sentences: it was said that where another judge would think three years imprisonment a sufficient punishment, Andrews would usually impose a sentence of ten years. He was made a member of the Privy Council of Ireland in 1897. He retired in 1909 and died in 1924.
Character
Maurice Healy's portrayal of Andrews in The Old Munster Circuit is valuable but largely second-hand, since he apparently only met him once. He describes Andrews as a quiet, precise, modest and courteous man, diligent, upright, and with a great fund of legal knowledge. Despite the severity of the sentences he handed down in criminal cases, he was esteemed by all who knew him. V.T.H Delaney in his biography of Christopher Palles gives a similar view of Andrews's character. Serjeant Sullivan ranked Andrews as a judge as one of the four greatest he had known, whether in Ireland or England, together with Christopher Palles, Sir Andrew Porter and Gerald FitzGibbon - "men whose superiors I have yet to meet".