Fifth
An elaborated American form of the Latin name Quintus. It follows the pattern of adding the 'arius' suffix to traditional Roman roots, a style that gained popularity in the late 20th century. It literally denotes the fifth-born child.
Fewer than 5 boys were named Quintarius in 2025.
US births per 5-year period, 1990–present (SSA data).
Professional football player and reality television contestant
