| Husband: | Libo + JULIUS (360- ) | |
| Wife: | Cecilia + METELA (362- ) | |
| Children: | Lucius + LIBO (330- ) | |
| Name: | Libo + JULIUS | |
| Sex: | Male | |
| Name Prefix: | Lucius | |
| Father: | - | |
| Mother: | - | |
| Birth | 0360 B.C. | Rome, Italy |
| Occupation | Consul of Rome | |
| Title | Consul of Rome | |
| Name: | Cecilia + METELA | |
| Sex: | Female | |
| Father: | - | |
| Mother: | - | |
| Birth | 0362 B.C. | |
| Name: | Lucius + LIBO | |
| Sex: | Male | |
| Birth | 0330 B.C. | |
Lucius Julius Libo was a member of the influential Julii clan. This patrician family was always of the most distinguished blood, however they had long since fallen out of the inner Roman elite. The Julii were active in politics since the Punic Wars.
Libo descended from the Julii who fled from Alba Longa to Rome. This city was destroyed by the Roman king Tullus Hostilius. His ancestors claim their descent from the goddess Venus and the first Roman king Romulus. He had a son of the same name Lucius Julius Libo II with Caecilia Metella Macedonica, daughter of Lucius Caecilius Metellus Denter and Barsine of Macedonia.
Libo was consul in 267 BC. According to the Fasti Triumphales he celebrated a triumph over the Sallentini on 23 January 266 BC. His son of the same name was father to Numerius Julius Caesar, born before 300 BC. Numerius was a grandfather to Sextus Julius Caesar I.