In the customs of the kingdom of England, the caput baroniae (Latin, 'head of the barony') was the ancient, or chief seat or castle of a nobleman, which was not to be divided among the daughters upon his death, in case there be no son to inherit.
According to English customs, the caput baroniae (Latin for 'head of the barony') referred to the ancestral or principal residence or castle of a nobleman. This property was not to be split among his daughters in case he died without leaving a male heir.