Balbus was probably a son of the Consul of 150. His praenomen is confirmed by Fast. Ant. Cato was a grandson of the Censor and a nephew of Scipio Aemilianus (Cic. Brut. 108; Verr. 2.4.22; Vell. 2.8.1). (Broughton MRR I)
Fast. Ant., Degrassi 162f. (M'. Acili. B[a]lbus, C. Po[r]ci. Cat[o]); Plin. NH 2.98, and 147; Obseq. 37; Chr. 354 (Bulbo et Cato); Fast. Hyd. (Balbo et Catone), so also Chr. Pasc.; Cassiod.; on Acilius, I. Cret. 3.4.10, line 10f.; and on Cato, Liv. Per. 63; Eutrop. 4.24. See Degrassi 127, 474f. Cato was defeated in Macedonia by the Scordisci (Liv. Per. 63; Flor. 1.39.4; Dio 26, fr. 88; Ruf. Fest. Brev. 9.1; Amm. Marc. 27.4.4), and fined for extortion upon his return (Cic. Verr. 2.3.184, and 4.22; Balb. 28; Vell. 2.8.1). On Cato, see D.- G. 5.162, no. 19; and below, 109, Tribunes of the Plebs. (Broughton MRR I)