Suo jure
Suo jure (suo iure) is a Latin phrase, used in English to mean 'in his own right' or 'in her own right'. In most nobility-related contexts, it means 'in her own right', since in those situations the phrase is normally used of women; in practice, especially in England, a man rarely derives any style or title from his wife (an example is Richard Neville, Earl of Warwick from his wife's heritage) although this is seen in other countries when a woman is the last heir of her line.