Viscount Linley's Children
Charles Patrick Inigo
Charles: is after the Prince of Wales.
Patrick: is the patron saint of Ireland - Charles's mother was born in Limerick.
Inigo: is after Inigo Jones, who is said to be Linley's hero.
Margarita Elizabeth Rose Alleyne
Margarita: is a diminutive of Margaret, her paternal grandmother's name.
Elizabeth: I assume is after the Queen Mother, although I'm not 100 % sure as it could be after HM.
Rose: was personally selected by Margarita's brother Charles.
Alleyne: is a name in her mother's family.
I know they're not really royal!
HM (Elizabeth II)
I remember hearing that she was actually named after Elizabeth I, and not The Queen Mother like I assumed.