Popularity trend for the name Isobel in Aotearoa New Zealand, based on Department of Internal Affairs birth registrations.
Isobel reached its highest rank of #74 for girls in 1927. In 2025, 20 babies were registered as Isobel, ranking #200 for girls. Its popularity is falling compared with five years earlier. Isobel 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.