Was a Liverpool cotton merchant. After his death, his wife, Florence Maybrick, was convicted of his murder by poisoning in a sensational trial. The "Aigburth Poisoning" case was widely reported in the press on both sides of the Atlantic. More than a century after his death, Maybrick was named as a suspect in the notorious Jack the Ripper murders, but critics countered that supporting evidence was hoaxed.
In Maybrick's case a common-law wife, Sarah Ann Robertson, was identified. Sarah Ann is mentioned in her stepfather's will as "Sarah Ann Maybrick, wife of James".