Also used in Spanish, although this name is rare in Spain, with only 198 bearers (source: Instituto Nacional de Estadística (INE)).This name is more used in Latin America. (https://forebears.io/forenames/juvenal)
I once saw this name on a baby who was either stillborn or died soon after birth. The name seems rather fitting in a case like that, where the child would be permanently juvenile and never have to actually use the name. Other than that, it seems rather odd on a modern person.