tresayle

If the abatement happened on the death of one's grandfather or grandmother, then an assise of mort d'ancestor no longer lies, but a writ of ayle or de avo: if on the death of the great-grandfather or great-grandmother, then a writ of be sayle, or de proavo: but if it mounts one degree higher, to the tresayle, or grandfather's grandfather, of if the abatement happened upon the death of any collateral relation, other than those before-mentioned, the write is called a writ of cosinage, or de consanguineo.