Lucius (/ˈluːʃ(i)əs/ LOO-sh(ee-)əs, Latin: [ˈluːkiʊs]) is a Latin praenomen, or personal name, which was one of the most common names throughout Roman history.[1] The feminine form is Lucia (/ˈluːʃiə, luːˈtʃiːə/ LOO-shee-ə, loo-CHEE-ə, Latin: [ˈluːkia]).[2][3] The praenomen was used by both patrician and plebeian families, and gave rise to the patronymic gentes Lucia and Lucilia.[4] It was regularly abbreviated L.[5][6]
Throughout Roman history, Lucius was the most common praenomen, used slightly more than Gaius and somewhat more than Marcus. Although a number of prominent families rarely or never used it,[7][8][9] it was amongst the most frequently given names in countless others.[8] The name survived the collapse of the Western Empire in the fifth century, and has continued into modern times.