the holder of a scottish barony ("e.g.", "inverglen") may add the title to his existing name ("e.g.", "john smith, baron of inverglen") or add the territorial designation to his surname if still in possession of the caput ("john smith of inverglen, baron of inverglen"); some of the oldest scottish families prefer to be styled by the territorial designation alone ("smith of inverglen"). formal and in writing, they are styled as the much honoured baron of inverglen. a baron may be addressed socially as "inverglen" or "baron," and introduced in the third person as "john smith of inverglen, baron of inverglen" or "the baron of inverglen". when referred to informally in the third person it is incorrect to refer to him as "baron inverglen" or "lord inverglen", as these would imply a peerage title (i.e. lord of parliament) a married couple may be styled "the baron and baroness of inverglen", "inverglen and madam smith of inverglen", "inverglen and lady inverglen", or "the baron of inverglen and lady inverglen." the oldest son of a feudal baron may be known by his father's territorial designation with the addition of "yr" (abbreviation for "younger"), as in "john smith of inverglen, yr" and the eldest daughter if heir apparent is entitled to use the courtesy title "maid of [barony]" at the end of her name.