(adjective) : Pīso, ōnis, m.
* A Roman surname in the gens Calpurnia; v. Calpurnius,Cic. Font. 13, 39; Juv. 5, 109.—Hence
* Pīsōnĭ-ānus, a, um, , of or belonging to a Piso, Pisonian: Pisoniana conjuratio,Suet. Ner. 36: Pisoniano vitio, cum loqui nesciret, tacere non potuit (with reference to Cic. Pis. 1, 1, where Cicero charges Piso with lack of eloquence), Hier. Ep. 69, 2.

Male Personal name
Confirmed occurences in the Roman Empire:

• C. Calpurnius Crassus Frugi Licinianus C. Calpurnius Piso Crassus Frugi Licinianus (Masc, senator), ref: PIR C 0259 | PIR ID3436
• Calpurnius Piso (Masc, senator), ref: PIR C 0280 | PIR ID3466
• Calpurnius Piso (Masc, senator), ref: PIR C 0281 | PIR ID3467
• Calpurnius Piso (Masc, senator), ref: PIR C 0282 | PIR ID3468
• Calpurnius Piso (Masc, senator), ref: PIR C 0283 | PIR ID3469
• C. Calpurnius Piso (Masc, senator), ref: PIR C 0284 | PIR ID3470
• C. Calpurnius Piso (Masc, senator), ref: PIR C 0285 | PIR ID3471
• Cn. Calpurnius Piso (Masc, senator), ref: PIR C 0286 | PIR ID3472
• Cn. Calpurnius Piso (Masc, senator), ref: PIR C 0287 | PIR ID3473
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0288 | PIR ID3474
• L. Calpurnius Piso pontifex (Masc, senator), ref: PIR C 0289 | PIR ID3475
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0290 | PIR ID3476
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0291 | PIR ID3477
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0292 | PIR ID3478
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0293 | PIR ID3479
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0294 | PIR ID3480
• L. Calpurnius Piso (Masc, senator), ref: PIR C 0295 | PIR ID3481
• M. Calpurnius Piso (Masc, senator), ref: PIR C 0296 | PIR ID3482
• C. Calpurnius Piso (Masc, senator), ref: Vidman FO 45 | PIR ID3483
• C. Calpurnius Piso (Masc, senator), ref: AJPh 101 (1980) 334-335 n. 3 | PIR ID3484
• C. Calpurnius Piso Crassus Frugi Licinianus (Masc, senator), ref: PIR C 0297 | PIR ID3485
• Calpurnius Piso Frugi (Masc, senator), ref: PIR C 0298 (= P² 0428 = P¹ 0323) | PIR ID3486
• C. Calpurnius Piso Frugi (Masc, senator), ref: PIR C 0299 | PIR ID3487
• L. Calpurnius Piso Frugi Licinianus (Masc, senator), ref: PIR C 0300 | PIR ID3488
• Calpurnius Piso Galerianus (Masc, senator), ref: PIR C 0301 | PIR ID3489
• Claudius Piso (Masc, senator), ref: PIR C 0960 | PIR ID4413
• Ti. Claudius Piso (Masc), ref: PIR C 0961 | PIR ID4414
• Domitius Piso (Masc), ref: PIR D 0158 | PIR ID5440
• T. Flavius Piso (Masc, eques), ref: RE Suppl. 15 (1978) 100 s.v. Flavius 147a | PIR ID6179
• Iulius Piso (Masc, senator), ref: PIR I 0465 | PIR ID7677
• Iulius Piso (Masc), ref: PIR I 0466 | PIR ID7678
• T. Iulius Piso (Masc), ref: PIR I 0467 | PIR ID7679
• A. Iulius Pompilius Piso T. Vibius Varus Laevillus Berenicianus (Masc, senator), ref: PIR I 0477 | PIR ID7690
• ...ius Piso (Masc, senator), ref: PIR P 0422 | PIR ID8070
• Piso (Masc), ref: PIR P 0423 | PIR ID10440
• Piso (Masc), ref: PIR P 0424 | PIR ID10441
• Piso (Masc), ref: PIR P 0425 | PIR ID10442
• Piso (Masc), ref: PIR P 0426 | PIR ID10443
• Piso (Masc), ref: PIR P 0427 | PIR ID10444
• Rocius Piso ...rocius Piso (Masc, senator), ref: PIR R 0072 | PIR ID11427
• Rocius Piso ...rocius Piso (Masc, senator), ref: PIR R 0072 | PIR ID11427