May it please Your Majesty
Her Majesty The Queen
The Most Hon The Marquess of Whatever
The Most Hon The Marquess Whatever
It (the ‘of’, that is ) may be omitted in the form of Marquessates and Earldoms and included in the form of Scottish Viscountcies. It is never present in peerage Baronies and Lordships of Parliament and always present in Dukedoms and Scottish feudal Baronies.
If the definite article is not used before courtesy peerages and The Hon Elizabeth Smith marries Sir William Brown, she becomes The Hon Lady Brown, but if she marries the higher-ranked Lord Brown, a courtesy Baron, she becomes only Lady Brown. If this Sir William Brown's father is created Earl of London and Baron Brown, as a result of this enoblement, his wife's style will actually change, from "The Hon Lady Brown" to "Lady Brown". It is important to note that while the style may appear diminished, the precedence taken increases from that of the wife of a knight to that of the wife of an earl's eldest son.