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for women who have been honoured with a British knighthood in their own right. Women married to knighted individuals, but not knighted in their own right, are commonly referred to as "Lady".

For male children: Young boys were formerly addressed as "Master [first name]." This was the standard form for servants to use in addressing their employer's minor sons. It is also the courtesy title for the eldest son of a Scottish laird.

Formal title for unmarried females and for female children

Adult male (regardless of marital status)

Adult females (usually just for married females, widows, and divorcées)

Adult females (used by those who are not strongly identified with their marital status or don't wish their marital status to be known; the female equivalent of Mr)

Does not indicate gender, usually an option for non-binary people (the gender-neutral equivalent of Mr and Ms)

for men, formally if they have a British knighthood or if they are a baronet (used with first name or full name, never surname alone) or generally (used on its own) as a term of general respect or flattery, when it is equivalent in meaning to "Madam" for women (see below). Also used in secondary sch...