Dido (singer) was born on Christmas Day, she also celebrates an "official birthday" on 25 June, following the example of Paddington Bear. Her mother, Clare (née Collins), is a poet of French ancestry, and her father, William O'Malley Armstrong (1938–2006), was an Irish publisher and former managing director of Sidgwick & Jackson. Her elder brother, Rowland Constantine O'Malley Armstrong, is better known as record producer Rollo, part of the British electronica trio Faithless. Despite their birth names, the pair were known from childhood by the names Dido and Rollo and Dido considers this as her real name, and not simply a stage
Rollo his parents were the Norwegian jarl Rognvald Eysteinsson ("Rognvald the Wise") and a noblewoman from Møre named Hildr Hrólfsdóttir. However, these claims were made three centuries after the history commissioned by Rollo's own grandson. There may be circumstantial evidence for kinship between Rollo and his historical contemporary, Ketill Flatnose, King of the Isles – a Norse realm centred on the Western Isles of Scotland. If, as Richer suggested, Rollo's father was also named Ketill and as Dudo suggested, Rollo had a brother named Gurim, such names are onomastic evidence for a family connection: Icelandic sources name Ketill Flatnose's father as