Some clergy are advised by the ORDO RECITANDI on their desks to say the third of their three All Souls Day Masses for "the Roman Pontiff's Intentions". As I understand it, and subject to correction, that Mass should be said according to the Intentions of Pope Benedict XV, "for the souls of all, especially youth, who fall victim to the appalling carnage of war."
Pope Benedict XV also linked in here "and to make up for testamentary masses neglected or forgotten".
Since we have most of November, the Month of the Departed, still before us, I take the liberty of deferentially suggesting to my reverend brethren in the Sacred Priesthood the good sense of that last Intention. In England, thousands of Masses endowed before 1559 are never said. I try to remember to say Masses for those who endowed Masses but whose endowments were, at the 'Reformation', annexed to either my own School, or my College, or my University, thus making me one of their beneficiaries; and also for some whom I got to know because I met them in my historical researches as I wandered around in the period 1490-1510 within the County of Devon.
Yes, Archdeacon Holyborton (I hope you enjoyed your pilgrimage to Jerusalem ... but I have to tell you that the splendid purple humeral veil you brought back for Exeter Cathedral did not survive the Tudors) ... Yes, Dame Thomasina (what a good idea it was to found that school, but I don't think the ad scalas Masses you endowed in Westminster Abbey are still being said) ... I mean you ... among so many others ...
And I sometimes say the Votive of the Five Wounds, which was so often endowed in medieval England instead of Requiems. A translation of the once immensely popular old Sarum texts for that Votive is to be found in the Ordinariate Missal.
Those texts are closely similar to the Tridentine Votive Humiliavit. Clergy without Ordinariate faculties could say that Mass.