Mortuus sine prole
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Dead without issue
In genealogical tables often abbreviated to "m.p." Mortuus exitus non est exitns. A dead issue is no issue.
Co. Litt 29.
A child born dead is not considered as issue. Mos retinendus est fidelissimae vetustatis.
4 Coke, 78.
A custom of the truest antiquity is to be retained.