Serious is an uncommon given name of Latin origin, derived from the Latin word "serius," meaning "grave" or "solemn." It was popularized as a given name by early Christians who believed it had biblical significance due to its similarity to the Hebrew name "Seraiah." The name gained some usage in medieval Europe but has since become quite rare.
Serious was not very popular for babies during those years. Only six newborns were named Serious each in 2010 and 2012, resulting in a total of twelve little Seriouses over the two-year span.