Gannicus is of Latin origin, derived from the gens (clan) name Gennicius. It was borne by a fourth-century Christian martyr venerated as Saint Genvcius in some French regions. The name likely evolved from an earlier Roman cognomen meaning 'descendant of Gennius,' with Gennius possibly being related to the Latin word 'genus' meaning 'race' or 'kind.' In the Middle Ages, the name was often recorded as Gennicius and Jenicus, contributing to its current form, Gannicus.
"Gannicus experienced a spike in popularity between 2016 and 2017, with the highest number of births recorded during this period. However, it seems that its appeal has since declined, as the annual birth count has returned to single digits."