Brazilian/Portuguese-influenced name possibly derived from Janeiro (January), from Latin Januarius.
Janaira is a modern Spanish-influenced name, possibly derived from Janeiro, the Portuguese and Spanish word for January, which in turn comes from Latin Januarius. That connection gives the name a subtle calendar and beginning-of-year resonance, even though its modern form is more creative than literal.
As a given name, Janaira feels melodic and contemporary. It has the flowing quality that often characterizes modern Latin American and Portuguese-influenced inventions, where sound and rhythm are as important as origin. The name seems fresh and stylish, yet it still hints at a deeper historical root. Janaira therefore feels both invented and anchored, a good fit for modern naming tastes.