a. and sb. [in sense 1, f. L. cognōmin-is having the same name; in 2, f. cognōmin-, stem of COGNOMEN: see -AL.]
A. adj.
1. Having the same name or cognomen, like-named.
1656. Blount, Glossogr., Cognominal, that hath one and the same name or sir-name.
1766. Entick, London, IV. 1289. Distinguished from other cognominal dedications, by the name of St. Jamess chapel, or Hermitage on the wall.
1831. T. L. Peacock, Crotchet Castle, ix. The immortal nose which is still resplendent over the portals of its cognominal college [Brasenose].
2. Of or pertaining to a cognomen or surname.
1659. Pearson, Creed (1741), 194. The second [name] Pilatus as a cognominal addition distinguishing from the rest descending from the same family.
1855. W. H. Mill, Applic. Panth. Princ. (1861), 171. A cognominal epithet of the elder son.
1866. J. B. Rose, trans. Ovids Fasti, I. 647. No Roman house had grade cognominal Above the Fabii; titled above all As Maxima.
† B. sb. One who or that which has the same name as another; a namesake. Obs. rare.
1646. Sir T. Browne, Pseud. Ep., III. xxiv. 170. The Dog [and] his cognominall or name-sake in the heavens.