2. This has been held to be no part of a man's name, but an addition by use, and a convenient distinction between a father and son of the same name. 10 Mass. R. 203 10 Paige, 170; 1 Pick. R. 388; 7 John . It. 549; 2 Caines, 164 1 Pick. 388 15 Pick. 7; 17 Pick. 200 3 Metc. 330.
3. Any matter that distinguishes persons renders the addition of junior or senior unnecessary. 1 Mod. Ent. 35; Salk. 7. But if father and son have both the same name, the father shall be, prima facie, intended, if junior be not added, or some other matter of distinction. Salk, 7; 6 Rep. 20 11 Rep. 39; Hob. 330. If father and son have the same name and addition, and the former sue the latter, the writ is abateable unless the son have the further addition of junior, or the younger. But if the father be the defendant and the son the plaintiff, there is no need of the further addition of senior, or the elder, to the name of the father. 2 Hawk. 187; Laws of Women, 380.