M'.

Appendix:Variations of "m" Latin Alternative forms la M' la M.' la M.’ la M’ la M’. Proper noun M'. m 1 Manius Usage notes The use of M followed by a diacritic mark is a convention used in many modern printed sources to represent the symbol ꟿ used in the Roman originals. Synonyms ꟿ. References Bruun, Christer, "Roman Onomastics" p.799 in The Oxford Handbook of Roman Epigraphy (Oxford University Press, 2015) 9780195336467 Gordon, Arthur Ernest, Illustrated Introduction to Latin Epigraphy p.21 fn.65 (University of California Press, 1983) 9780520038981 Sandys, John Edwin, Latin Epigraphy: An Introduction to the Study of Latin Inscriptions p.51 (CUP Archive, 1927)