Popularity trend for the name Cassius in Aotearoa New Zealand, based on Department of Internal Affairs birth registrations.
Cassius reached its highest rank of #199 for boys in 2015. Cassius did not appear in the 2025 figures, which only list names given to at least 10 babies. Its popularity has stayed fairly steady over the last few years. Cassius is used mainly for boys.
About this data: figures come from Department of Internal Affairs birth registrations for 1954-2025. The DIA only publishes a name for a given year when at least 10 babies were registered with it, so rarer names - and rarer spellings - are missing entirely, and a name can drop out of the record in quieter years. Spelling variants are counted separately, and counts reflect first names as registered.