Popularity trend for the name Tilly in Aotearoa New Zealand, based on Department of Internal Affairs birth registrations.
Tilly reached its highest rank of #91 for girls in 2023. In 2025, 38 babies were registered as Tilly, ranking #105 for girls. Its popularity is rising compared with five years earlier. Tilly is used mainly for girls.
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.